diff --git a/package-lock.json b/package-lock.json
index 511251ba79..27bb6f3a35 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -144,8 +144,8 @@
       }
     },
     "@sveltejs/eslint-config": {
-      "version": "github:sveltejs/eslint-config#848ce6464a9ae9c2f3a3095474701dfe9ab851df",
-      "from": "github:sveltejs/eslint-config#v5.0.0",
+      "version": "github:sveltejs/eslint-config#673335baf2ebc4b845eca9ea8eb51a050fd5cc25",
+      "from": "github:sveltejs/eslint-config#v5.2.0",
       "dev": true
     },
     "@tootallnate/once": {
diff --git a/package.json b/package.json
index fbb64f3453..b93da0d5f4 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "posttest": "agadoo internal/index.mjs",
     "prepublishOnly": "npm run lint && PUBLISH=true npm test",
     "tsd": "tsc -p src/compiler --emitDeclarationOnly && tsc -p src/runtime --emitDeclarationOnly",
-    "lint": "eslint \"{src,test}/**/*.{ts,js}\""
+    "lint": "eslint '{src,test}/**/*.{ts,js}'"
   },
   "repository": {
     "type": "git",
@@ -63,7 +63,7 @@
     "@rollup/plugin-sucrase": "^3.0.0",
     "@rollup/plugin-typescript": "^2.0.1",
     "@rollup/plugin-virtual": "^2.0.0",
-    "@sveltejs/eslint-config": "github:sveltejs/eslint-config#v5.0.0",
+    "@sveltejs/eslint-config": "github:sveltejs/eslint-config#v5.2.0",
     "@types/mocha": "^7.0.0",
     "@types/node": "^8.10.53",
     "@typescript-eslint/eslint-plugin": "^3.0.2",
diff --git a/src/compiler/compile/Component.ts b/src/compiler/compile/Component.ts
index 235cf37737..c16862165c 100644
--- a/src/compiler/compile/Component.ts
+++ b/src/compiler/compile/Component.ts
@@ -157,7 +157,7 @@ export default class Component {
 				) || { start: 0, end: 0 };
 				this.warn(svelteOptions, {
 					code: 'custom-element-no-tag',
-					message: `No custom element 'tag' option was specified. To automatically register a custom element, specify a name with a hyphen in it, e.g. <svelte:options tag="my-thing"/>. To hide this warning, use <svelte:options tag={null}/>`
+					message: 'No custom element \'tag\' option was specified. To automatically register a custom element, specify a name with a hyphen in it, e.g. <svelte:options tag="my-thing"/>. To hide this warning, use <svelte:options tag={null}/>'
 				});
 			}
 			this.tag = this.component_options.tag || compile_options.tag;
@@ -241,7 +241,7 @@ export default class Component {
 			const { compile_options, name } = this;
 			const { format = 'esm' } = compile_options;
 
-			const banner = `${this.file ? `${this.file} ` : ``}generated by Svelte v${'__VERSION__'}`;
+			const banner = `${this.file ? `${this.file} ` : ''}generated by Svelte v${'__VERSION__'}`;
 
 			const program: any = { type: 'Program', body: result.js };
 
@@ -458,16 +458,16 @@ export default class Component {
 	extract_exports(node) {
 		if (node.type === 'ExportDefaultDeclaration') {
 			this.error(node, {
-				code: `default-export`,
-				message: `A component cannot have a default export`
+				code: 'default-export',
+				message: 'A component cannot have a default export'
 			});
 		}
 
 		if (node.type === 'ExportNamedDeclaration') {
 			if (node.source) {
 				this.error(node, {
-					code: `not-implemented`,
-					message: `A component currently cannot have an export ... from`
+					code: 'not-implemented',
+					message: 'A component currently cannot have an export ... from'
 				});
 			}
 			if (node.declaration) {
@@ -478,7 +478,7 @@ export default class Component {
 							variable.export_name = name;
 							if (variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
 								this.warn(declarator, {
-									code: `unused-export-let`,
+									code: 'unused-export-let',
 									message: `${this.name.name} has unused export property '${name}'. If it is for external reference only, please consider using \`export const ${name}\``
 								});
 							}
@@ -501,7 +501,7 @@ export default class Component {
 
 						if (variable.writable && !(variable.referenced || variable.referenced_from_script || variable.subscribable)) {
 							this.warn(specifier, {
-								code: `unused-export-let`,
+								code: 'unused-export-let',
 								message: `${this.name.name} has unused export property '${specifier.exported.name}'. If it is for external reference only, please consider using \`export const ${specifier.exported.name}\``
 							});
 						}
@@ -550,7 +550,7 @@ export default class Component {
 			if (name[0] === '$') {
 				this.error(node as any, {
 					code: 'illegal-declaration',
-					message: `The $ prefix is reserved, and cannot be used for variable and import names`
+					message: 'The $ prefix is reserved, and cannot be used for variable and import names'
 				});
 			}
 
@@ -568,7 +568,7 @@ export default class Component {
 			if (name[0] === '$') {
 				this.error(node as any, {
 					code: 'illegal-subscription',
-					message: `Cannot reference store value inside <script context="module">`
+					message: 'Cannot reference store value inside <script context="module">'
 				});
 			} else {
 				this.add_var({
@@ -629,7 +629,7 @@ export default class Component {
 			if (name[0] === '$') {
 				this.error(node as any, {
 					code: 'illegal-declaration',
-					message: `The $ prefix is reserved, and cannot be used for variable and import names`
+					message: 'The $ prefix is reserved, and cannot be used for variable and import names'
 				});
 			}
 
@@ -867,8 +867,8 @@ export default class Component {
 
 				if (name[1] !== '$' && scope.has(name.slice(1)) && scope.find_owner(name.slice(1)) !== this.instance_scope) {
 					this.error(node, {
-						code: `contextual-store`,
-						message: `Stores must be declared at the top level of the component (this may change in a future version of Svelte)`
+						code: 'contextual-store',
+						message: 'Stores must be declared at the top level of the component (this may change in a future version of Svelte)'
 					});
 				}
 			}
@@ -935,7 +935,7 @@ export default class Component {
 										// TODO is this still true post-#3539?
 										component.error(declarator as any, {
 											code: 'destructured-prop',
-											message: `Cannot declare props in destructured declaration`
+											message: 'Cannot declare props in destructured declaration'
 										});
 									}
 
@@ -1379,7 +1379,7 @@ function process_component_options(component: Component, nodes) {
 				switch (name) {
 					case 'tag': {
 						const code = 'invalid-tag-attribute';
-						const message = `'tag' must be a string literal`;
+						const message = "'tag' must be a string literal";
 						const tag = get_value(attribute, code, message);
 
 						if (typeof tag !== 'string' && tag !== null)
@@ -1387,15 +1387,15 @@ function process_component_options(component: Component, nodes) {
 
 						if (tag && !/^[a-zA-Z][a-zA-Z0-9]*-[a-zA-Z0-9-]+$/.test(tag)) {
 							component.error(attribute, {
-								code: `invalid-tag-property`,
-								message: `tag name must be two or more words joined by the '-' character`
+								code: 'invalid-tag-property',
+								message: "tag name must be two or more words joined by the '-' character"
 							});
 						}
 
 						if (tag && !component.compile_options.customElement) {
 							component.warn(attribute, {
 								code: 'missing-custom-element-compile-options',
-								message: `The 'tag' option is used when generating a custom element. Did you forget the 'customElement: true' compile option?`
+								message: "The 'tag' option is used when generating a custom element. Did you forget the 'customElement: true' compile option?"
 							});
 						}
 
@@ -1405,7 +1405,7 @@ function process_component_options(component: Component, nodes) {
 
 					case 'namespace': {
 						const code = 'invalid-namespace-attribute';
-						const message = `The 'namespace' attribute must be a string literal representing a valid namespace`;
+						const message = "The 'namespace' attribute must be a string literal representing a valid namespace";
 						const ns = get_value(attribute, code, message);
 
 						if (typeof ns !== 'string')
@@ -1415,12 +1415,12 @@ function process_component_options(component: Component, nodes) {
 							const match = fuzzymatch(ns, valid_namespaces);
 							if (match) {
 								component.error(attribute, {
-									code: `invalid-namespace-property`,
+									code: 'invalid-namespace-property',
 									message: `Invalid namespace '${ns}' (did you mean '${match}'?)`
 								});
 							} else {
 								component.error(attribute, {
-									code: `invalid-namespace-property`,
+									code: 'invalid-namespace-property',
 									message: `Invalid namespace '${ns}'`
 								});
 							}
@@ -1446,14 +1446,14 @@ function process_component_options(component: Component, nodes) {
 
 					default:
 						component.error(attribute, {
-							code: `invalid-options-attribute`,
-							message: `<svelte:options> unknown attribute`
+							code: 'invalid-options-attribute',
+							message: '<svelte:options> unknown attribute'
 						});
 				}
 			} else {
 				component.error(attribute, {
-					code: `invalid-options-attribute`,
-					message: `<svelte:options> can only have static 'tag', 'namespace', 'accessors', 'immutable' and 'preserveWhitespace' attributes`
+					code: 'invalid-options-attribute',
+					message: "<svelte:options> can only have static 'tag', 'namespace', 'accessors', 'immutable' and 'preserveWhitespace' attributes"
 				});
 			}
 		});
diff --git a/src/compiler/compile/css/Selector.ts b/src/compiler/compile/css/Selector.ts
index 46e9b4c4f0..e20aa43fb6 100644
--- a/src/compiler/compile/css/Selector.ts
+++ b/src/compiler/compile/css/Selector.ts
@@ -118,8 +118,8 @@ export default class Selector {
 				const selector = block.selectors[i];
 				if (selector.type === 'PseudoClassSelector' && selector.name === 'global') {
 					component.error(selector, {
-						code: `css-invalid-global`,
-						message: `:global(...) must be the first element in a compound selector`
+						code: 'css-invalid-global',
+						message: ':global(...) must be the first element in a compound selector'
 					});
 				}
 			}
@@ -139,8 +139,8 @@ export default class Selector {
 		for (let i = start; i < end; i += 1) {
 			if (this.blocks[i].global) {
 				component.error(this.blocks[i].selectors[0], {
-					code: `css-invalid-global`,
-					message: `:global(...) can be at the start or end of a selector sequence, but not in the middle`
+					code: 'css-invalid-global',
+					message: ':global(...) can be at the start or end of a selector sequence, but not in the middle'
 				});
 			}
 		}
@@ -286,7 +286,7 @@ function test_attribute(operator, expected_value, case_insensitive, value) {
 		case '^=': return value.startsWith(expected_value);
 		case '$=': return value.endsWith(expected_value);
 		case '*=': return value.includes(expected_value);
-		default: throw new Error(`this shouldn't happen`);
+		default: throw new Error("this shouldn't happen");
 	}
 }
 
diff --git a/src/compiler/compile/css/Stylesheet.ts b/src/compiler/compile/css/Stylesheet.ts
index dc464d7df8..5547c6eb0c 100644
--- a/src/compiler/compile/css/Stylesheet.ts
+++ b/src/compiler/compile/css/Stylesheet.ts
@@ -5,7 +5,7 @@ import Element from '../nodes/Element';
 import { Ast } from '../../interfaces';
 import Component from '../Component';
 import { CssNode } from './interfaces';
-import hash from "../utils/hash";
+import hash from '../utils/hash';
 
 function remove_css_prefix(name: string): string {
 	return name.replace(/^-((webkit)|(moz)|(o)|(ms))-/, '');
@@ -428,7 +428,7 @@ export default class Stylesheet {
 		this.children.forEach(child => {
 			child.warn_on_unused_selector((selector: Selector) => {
 				component.warn(selector.node, {
-					code: `css-unused-selector`,
+					code: 'css-unused-selector',
 					message: `Unused CSS selector "${this.source.slice(selector.node.start, selector.node.end)}"`
 				});
 			});
diff --git a/src/compiler/compile/index.ts b/src/compiler/compile/index.ts
index c29cbc1dbf..1faa33ee1e 100644
--- a/src/compiler/compile/index.ts
+++ b/src/compiler/compile/index.ts
@@ -46,9 +46,9 @@ function validate_options(options: CompileOptions, warnings: Warning[]) {
 	}
 
 	if (name && /^[a-z]/.test(name)) {
-		const message = `options.name should be capitalised`;
+		const message = 'options.name should be capitalised';
 		warnings.push({
-			code: `options-lowercase-name`,
+			code: 'options-lowercase-name',
 			message,
 			filename,
 			toString: () => message
@@ -58,7 +58,7 @@ function validate_options(options: CompileOptions, warnings: Warning[]) {
 	if (loopGuardTimeout && !dev) {
 		const message = 'options.loopGuardTimeout is for options.dev = true only';
 		warnings.push({
-			code: `options-loop-guard-timeout`,
+			code: 'options-loop-guard-timeout',
 			message,
 			filename,
 			toString: () => message
diff --git a/src/compiler/compile/nodes/Animation.ts b/src/compiler/compile/nodes/Animation.ts
index 10cc9364a0..66363a5d3b 100644
--- a/src/compiler/compile/nodes/Animation.ts
+++ b/src/compiler/compile/nodes/Animation.ts
@@ -17,8 +17,8 @@ export default class Animation extends Node {
 
 		if (parent.animation) {
 			component.error(this, {
-				code: `duplicate-animation`,
-				message: `An element can only have one 'animate' directive`
+				code: 'duplicate-animation',
+				message: "An element can only have one 'animate' directive"
 			});
 		}
 
@@ -26,8 +26,8 @@ export default class Animation extends Node {
 		if (!block || block.type !== 'EachBlock' || !block.key) {
 			// TODO can we relax the 'immediate child' rule?
 			component.error(this, {
-				code: `invalid-animation`,
-				message: `An element that use the animate directive must be the immediate child of a keyed each block`
+				code: 'invalid-animation',
+				message: 'An element that use the animate directive must be the immediate child of a keyed each block'
 			});
 		}
 
diff --git a/src/compiler/compile/nodes/Binding.ts b/src/compiler/compile/nodes/Binding.ts
index d129f6589f..95fd51832c 100644
--- a/src/compiler/compile/nodes/Binding.ts
+++ b/src/compiler/compile/nodes/Binding.ts
@@ -3,7 +3,7 @@ import get_object from '../utils/get_object';
 import Expression from './shared/Expression';
 import Component from '../Component';
 import TemplateScope from './shared/TemplateScope';
-import {dimensions} from "../../utils/patterns";
+import {dimensions} from '../../utils/patterns';
 import { Node as ESTreeNode } from 'estree';
 
 // TODO this should live in a specific binding
diff --git a/src/compiler/compile/nodes/EachBlock.ts b/src/compiler/compile/nodes/EachBlock.ts
index 30306745bd..38cc976e6f 100644
--- a/src/compiler/compile/nodes/EachBlock.ts
+++ b/src/compiler/compile/nodes/EachBlock.ts
@@ -60,8 +60,8 @@ export default class EachBlock extends AbstractBlock {
 			if (this.children.length !== 1) {
 				const child = this.children.find(child => !!(child as Element).animation);
 				component.error((child as Element).animation, {
-					code: `invalid-animation`,
-					message: `An element that use the animate directive must be the sole child of a keyed each block`
+					code: 'invalid-animation',
+					message: 'An element that use the animate directive must be the sole child of a keyed each block'
 				});
 			}
 		}
diff --git a/src/compiler/compile/nodes/Element.ts b/src/compiler/compile/nodes/Element.ts
index 427ff5eb08..f734c2b625 100644
--- a/src/compiler/compile/nodes/Element.ts
+++ b/src/compiler/compile/nodes/Element.ts
@@ -63,14 +63,14 @@ const a11y_no_onchange = new Set([
 ]);
 
 const a11y_labelable = new Set([
-	"button",
-	"input",
-	"keygen",
-	"meter",
-	"output",
-	"progress",
-	"select",
-	"textarea"
+	'button',
+	'input',
+	'keygen',
+	'meter',
+	'output',
+	'progress',
+	'select',
+	'textarea'
 ]);
 
 const invisible_elements = new Set(['meta', 'html', 'script', 'style']);
@@ -136,8 +136,8 @@ export default class Element extends Node {
 				const value_attribute = info.attributes.find(node => node.name === 'value');
 				if (value_attribute) {
 					component.error(value_attribute, {
-						code: `textarea-duplicate-value`,
-						message: `A <textarea> can have either a value attribute or (equivalently) child content, but not both`
+						code: 'textarea-duplicate-value',
+						message: 'A <textarea> can have either a value attribute or (equivalently) child content, but not both'
 					});
 				}
 
@@ -251,7 +251,7 @@ export default class Element extends Node {
 		if (a11y_distracting_elements.has(this.name)) {
 			// no-distracting-elements
 			this.component.warn(this, {
-				code: `a11y-distracting-elements`,
+				code: 'a11y-distracting-elements',
 				message: `A11y: Avoid <${this.name}> elements`
 			});
 		}
@@ -273,8 +273,8 @@ export default class Element extends Node {
 
 			if (!is_figure_parent) {
 				this.component.warn(this, {
-					code: `a11y-structure`,
-					message: `A11y: <figcaption> must be an immediate child of <figure>`
+					code: 'a11y-structure',
+					message: 'A11y: <figcaption> must be an immediate child of <figure>'
 				});
 			}
 		}
@@ -290,8 +290,8 @@ export default class Element extends Node {
 
 			if (index !== -1 && (index !== 0 && index !== children.length - 1)) {
 				this.component.warn(children[index], {
-					code: `a11y-structure`,
-					message: `A11y: <figcaption> must be first or last child of <figure>`
+					code: 'a11y-structure',
+					message: 'A11y: <figcaption> must be first or last child of <figure>'
 				});
 			}
 		}
@@ -318,7 +318,7 @@ export default class Element extends Node {
 				if (invisible_elements.has(this.name)) {
 					// aria-unsupported-elements
 					component.warn(attribute, {
-						code: `a11y-aria-attributes`,
+						code: 'a11y-aria-attributes',
 						message: `A11y: <${this.name}> should not have aria-* attributes`
 					});
 				}
@@ -330,14 +330,14 @@ export default class Element extends Node {
 					if (match) message += ` (did you mean '${match}'?)`;
 
 					component.warn(attribute, {
-						code: `a11y-unknown-aria-attribute`,
+						code: 'a11y-unknown-aria-attribute',
 						message
 					});
 				}
 
 				if (name === 'aria-hidden' && /^h[1-6]$/.test(this.name)) {
 					component.warn(attribute, {
-						code: `a11y-hidden`,
+						code: 'a11y-hidden',
 						message: `A11y: <${this.name}> element should not be hidden`
 					});
 				}
@@ -348,7 +348,7 @@ export default class Element extends Node {
 				if (invisible_elements.has(this.name)) {
 					// aria-unsupported-elements
 					component.warn(attribute, {
-						code: `a11y-misplaced-role`,
+						code: 'a11y-misplaced-role',
 						message: `A11y: <${this.name}> should not have role attribute`
 					});
 				}
@@ -362,7 +362,7 @@ export default class Element extends Node {
 					if (match) message += ` (did you mean '${match}'?)`;
 
 					component.warn(attribute, {
-						code: `a11y-unknown-role`,
+						code: 'a11y-unknown-role',
 						message
 					});
 				}
@@ -371,24 +371,24 @@ export default class Element extends Node {
 			// no-access-key
 			if (name === 'accesskey') {
 				component.warn(attribute, {
-					code: `a11y-accesskey`,
-					message: `A11y: Avoid using accesskey`
+					code: 'a11y-accesskey',
+					message: 'A11y: Avoid using accesskey'
 				});
 			}
 
 			// no-autofocus
 			if (name === 'autofocus') {
 				component.warn(attribute, {
-					code: `a11y-autofocus`,
-					message: `A11y: Avoid using autofocus`
+					code: 'a11y-autofocus',
+					message: 'A11y: Avoid using autofocus'
 				});
 			}
 
 			// scope
 			if (name === 'scope' && this.name !== 'th') {
 				component.warn(attribute, {
-					code: `a11y-misplaced-scope`,
-					message: `A11y: The scope attribute should only be used with <th> elements`
+					code: 'a11y-misplaced-scope',
+					message: 'A11y: The scope attribute should only be used with <th> elements'
 				});
 			}
 
@@ -398,8 +398,8 @@ export default class Element extends Node {
 				// @ts-ignore todo is tabindex=true correct case?
 				if (!isNaN(value) && +value > 0) {
 					component.warn(attribute, {
-						code: `a11y-positive-tabindex`,
-						message: `A11y: avoid tabindex values above zero`
+						code: 'a11y-positive-tabindex',
+						message: 'A11y: avoid tabindex values above zero'
 					});
 				}
 			}
@@ -407,7 +407,7 @@ export default class Element extends Node {
 
 			if (/(^[0-9-.])|[\^$@%&#?!|()[\]{}^*+~;]/.test(name)) {
 				component.error(attribute, {
-					code: `illegal-attribute`,
+					code: 'illegal-attribute',
 					message: `'${name}' is not a valid attribute name`
 				});
 			}
@@ -415,14 +415,14 @@ export default class Element extends Node {
 			if (name === 'slot') {
 				if (!attribute.is_static) {
 					component.error(attribute, {
-						code: `invalid-slot-attribute`,
-						message: `slot attribute cannot have a dynamic value`
+						code: 'invalid-slot-attribute',
+						message: 'slot attribute cannot have a dynamic value'
 					});
 				}
 
 				if (component.slot_outlets.has(name)) {
 					component.error(attribute, {
-						code: `duplicate-slot-attribute`,
+						code: 'duplicate-slot-attribute',
 						message: `Duplicate '${name}' slot`
 					});
 
@@ -431,8 +431,8 @@ export default class Element extends Node {
 
 				if (!(parent.type === 'InlineComponent' || within_custom_element(parent))) {
 					component.error(attribute, {
-						code: `invalid-slotted-content`,
-						message: `Element with a slot='...' attribute must be a child of a component or a descendant of a custom element`
+						code: 'invalid-slotted-content',
+						message: 'Element with a slot=\'...\' attribute must be a child of a component or a descendant of a custom element'
 					});
 				}
 			}
@@ -440,7 +440,7 @@ export default class Element extends Node {
 			if (name === 'is') {
 				component.warn(attribute, {
 					code: 'avoid-is',
-					message: `The 'is' attribute is not supported cross-browser and should be avoided`
+					message: 'The \'is\' attribute is not supported cross-browser and should be avoided'
 				});
 			}
 
@@ -471,7 +471,7 @@ export default class Element extends Node {
 
 				if (href_value === '' || href_value === '#' || /^\W*javascript:/i.test(href_value)) {
 					component.warn(href_attribute, {
-						code: `a11y-invalid-attribute`,
+						code: 'a11y-invalid-attribute',
 						message: `A11y: '${href_value}' is not a valid ${href_attribute.name} attribute`
 					});
 				}
@@ -481,8 +481,8 @@ export default class Element extends Node {
 
 				if (!id_attribute_valid && !name_attribute_valid) {
 					component.warn(this, {
-						code: `a11y-missing-attribute`,
-						message: `A11y: <a> element should have an href attribute`
+						code: 'a11y-missing-attribute',
+						message: 'A11y: <a> element should have an href attribute'
 					});
 				}
 			}
@@ -520,8 +520,8 @@ export default class Element extends Node {
 
 				if (/\b(image|picture|photo)\b/i.test(alt_value)) {
 					component.warn(this, {
-						code: `a11y-img-redundant-alt`,
-						message: `A11y: Screenreaders already announce <img> elements as an image.`
+						code: 'a11y-img-redundant-alt',
+						message: 'A11y: Screenreaders already announce <img> elements as an image.'
 					});
 				}
 			}
@@ -531,8 +531,8 @@ export default class Element extends Node {
 			const has_input_child = this.children.some(i => (i instanceof Element && a11y_labelable.has(i.name) ));
 			if (!attribute_map.has('for') && !has_input_child) {
 				component.warn(this, {
-					code: `a11y-label-has-associated-control`,
-					message: `A11y: A form label must be associated with a control.`
+					code: 'a11y-label-has-associated-control',
+					message: 'A11y: A form label must be associated with a control.'
 				});
 			}
 		}
@@ -550,8 +550,8 @@ export default class Element extends Node {
 
 			if (!has_caption) {
 				component.warn(this, {
-					code: `a11y-media-has-caption`,
-					message: `A11y: Media elements must have a <track kind="captions">`
+					code: 'a11y-media-has-caption',
+					message: 'A11y: Media elements must have a <track kind="captions">'
 				});
 			}
 		}
@@ -559,8 +559,8 @@ export default class Element extends Node {
 		if (a11y_no_onchange.has(this.name)) {
 			if (handlers_map.has('change') && !handlers_map.has('blur')) {
 				component.warn(this, {
-					code: `a11y-no-onchange`,
-					message: `A11y: on:blur must be used instead of on:change, unless absolutely necessary and it causes no negative consequences for keyboard only or screen reader users.`
+					code: 'a11y-no-onchange',
+					message: 'A11y: on:blur must be used instead of on:change, unless absolutely necessary and it causes no negative consequences for keyboard only or screen reader users.'
 				});
 			}
 		}
@@ -578,8 +578,8 @@ export default class Element extends Node {
 
 			if (!attribute.is_static) {
 				component.error(attribute, {
-					code: `invalid-type`,
-					message: `'type' attribute cannot be dynamic if input uses two-way binding`
+					code: 'invalid-type',
+					message: '\'type\' attribute cannot be dynamic if input uses two-way binding'
 				});
 			}
 
@@ -587,8 +587,8 @@ export default class Element extends Node {
 
 			if (value === true) {
 				component.error(attribute, {
-					code: `missing-type`,
-					message: `'type' attribute must be specified`
+					code: 'missing-type',
+					message: '\'type\' attribute must be specified'
 				});
 			}
 
@@ -605,7 +605,7 @@ export default class Element extends Node {
 					this.name !== 'select'
 				) {
 					component.error(binding, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `'value' is not a valid binding on <${this.name}> elements`
 					});
 				}
@@ -617,8 +617,8 @@ export default class Element extends Node {
 
 					if (attribute && !attribute.is_static) {
 						component.error(attribute, {
-							code: `dynamic-multiple-attribute`,
-							message: `'multiple' attribute cannot be dynamic if select uses two-way binding`
+							code: 'dynamic-multiple-attribute',
+							message: '\'multiple\' attribute cannot be dynamic if select uses two-way binding'
 						});
 					}
 				} else {
@@ -627,7 +627,7 @@ export default class Element extends Node {
 			} else if (name === 'checked' || name === 'indeterminate') {
 				if (this.name !== 'input') {
 					component.error(binding, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `'${name}' is not a valid binding on <${this.name}> elements`
 					});
 				}
@@ -636,13 +636,13 @@ export default class Element extends Node {
 
 				if (type !== 'checkbox') {
 					let message = `'${name}' binding can only be used with <input type="checkbox">`;
-					if (type === 'radio') message += ` — for <input type="radio">, use 'group' binding`;
-					component.error(binding, { code: `invalid-binding`, message });
+					if (type === 'radio') message += ' — for <input type="radio">, use \'group\' binding';
+					component.error(binding, { code: 'invalid-binding', message });
 				}
 			} else if (name === 'group') {
 				if (this.name !== 'input') {
 					component.error(binding, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `'group' is not a valid binding on <${this.name}> elements`
 					});
 				}
@@ -651,14 +651,14 @@ export default class Element extends Node {
 
 				if (type !== 'checkbox' && type !== 'radio') {
 					component.error(binding, {
-						code: `invalid-binding`,
-						message: `'group' binding can only be used with <input type="checkbox"> or <input type="radio">`
+						code: 'invalid-binding',
+						message: '\'group\' binding can only be used with <input type="checkbox"> or <input type="radio">'
 					});
 				}
 			} else if (name === 'files') {
 				if (this.name !== 'input') {
 					component.error(binding, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `'files' is not a valid binding on <${this.name}> elements`
 					});
 				}
@@ -667,15 +667,15 @@ export default class Element extends Node {
 
 				if (type !== 'file') {
 					component.error(binding, {
-						code: `invalid-binding`,
-						message: `'files' binding can only be used with <input type="file">`
+						code: 'invalid-binding',
+						message: '\'files\' binding can only be used with <input type="file">'
 					});
 				}
 
 			} else if (name === 'open') {
 				if (this.name !== 'details') {
 					component.error(binding, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `'${name}' binding can only be used with <details>`
 					});
 				}
@@ -694,7 +694,7 @@ export default class Element extends Node {
 			) {
 				if (this.name !== 'audio' && this.name !== 'video') {
 					component.error(binding, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `'${name}' binding can only be used with <audio> or <video>`
 					});
 				}
@@ -704,7 +704,7 @@ export default class Element extends Node {
 			) {
 				if (this.name !== 'video') {
 					component.error(binding, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `'${name}' binding can only be used with <video>`
 					});
 				}
@@ -735,18 +735,18 @@ export default class Element extends Node {
 
 				if (!contenteditable) {
 					component.error(binding, {
-						code: `missing-contenteditable-attribute`,
-						message: `'contenteditable' attribute is required for textContent and innerHTML two-way bindings`
+						code: 'missing-contenteditable-attribute',
+						message: '\'contenteditable\' attribute is required for textContent and innerHTML two-way bindings'
 					});
 				} else if (contenteditable && !contenteditable.is_static) {
 					component.error(contenteditable, {
-						code: `dynamic-contenteditable-attribute`,
-						message: `'contenteditable' attribute cannot be dynamic if element uses two-way binding`
+						code: 'dynamic-contenteditable-attribute',
+						message: '\'contenteditable\' attribute cannot be dynamic if element uses two-way binding'
 					});
 				}
 			} else if (name !== 'this') {
 				component.error(binding, {
-					code: `invalid-binding`,
+					code: 'invalid-binding',
 					message: `'${binding.name}' is not a valid binding`
 				});
 			}
@@ -762,7 +762,7 @@ export default class Element extends Node {
 
 		if (this.children.length === 0) {
 			this.component.warn(this, {
-				code: `a11y-missing-content`,
+				code: 'a11y-missing-content',
 				message: `A11y: <${this.name}> element should have child content`
 			});
 		}
@@ -775,14 +775,14 @@ export default class Element extends Node {
 			if (handler.modifiers.has('passive') && handler.modifiers.has('preventDefault')) {
 				component.error(handler, {
 					code: 'invalid-event-modifier',
-					message: `The 'passive' and 'preventDefault' modifiers cannot be used together`
+					message: 'The \'passive\' and \'preventDefault\' modifiers cannot be used together'
 				});
 			}
 
 			if (handler.modifiers.has('passive') && handler.modifiers.has('nonpassive')) {
 				component.error(handler, {
 					code: 'invalid-event-modifier',
-					message: `The 'passive' and 'nonpassive' modifiers cannot be used together`
+					message: 'The \'passive\' and \'nonpassive\' modifiers cannot be used together'
 				});
 			}
 
@@ -799,13 +799,13 @@ export default class Element extends Node {
 						if (handler.can_make_passive) {
 							component.warn(handler, {
 								code: 'redundant-event-modifier',
-								message: `Touch event handlers that don't use the 'event' object are passive by default`
+								message: 'Touch event handlers that don\'t use the \'event\' object are passive by default'
 							});
 						}
 					} else {
 						component.warn(handler, {
 							code: 'redundant-event-modifier',
-							message: `The passive modifier only works with wheel and touch events`
+							message: 'The passive modifier only works with wheel and touch events'
 						});
 					}
 				}
@@ -876,7 +876,7 @@ function should_have_attribute(
 		attributes[0];
 
 	node.component.warn(node, {
-		code: `a11y-missing-attribute`,
+		code: 'a11y-missing-attribute',
 		message: `A11y: <${name}> element should have ${article} ${sequence} attribute`
 	});
 }
diff --git a/src/compiler/compile/nodes/Head.ts b/src/compiler/compile/nodes/Head.ts
index 53e76d7a4d..fb329f28ae 100644
--- a/src/compiler/compile/nodes/Head.ts
+++ b/src/compiler/compile/nodes/Head.ts
@@ -12,8 +12,8 @@ export default class Head extends Node {
 
 		if (info.attributes.length) {
 			component.error(info.attributes[0], {
-				code: `invalid-attribute`,
-				message: `<svelte:head> should not have any attributes or directives`
+				code: 'invalid-attribute',
+				message: '<svelte:head> should not have any attributes or directives'
 			});
 		}
 
diff --git a/src/compiler/compile/nodes/InlineComponent.ts b/src/compiler/compile/nodes/InlineComponent.ts
index 0bd1c9a6a7..ea63c39ec4 100644
--- a/src/compiler/compile/nodes/InlineComponent.ts
+++ b/src/compiler/compile/nodes/InlineComponent.ts
@@ -40,15 +40,15 @@ export default class InlineComponent extends Node {
 			switch (node.type) {
 				case 'Action':
 					component.error(node, {
-						code: `invalid-action`,
-						message: `Actions can only be applied to DOM elements, not components`
+						code: 'invalid-action',
+						message: 'Actions can only be applied to DOM elements, not components'
 					});
 
 				case 'Attribute':
 					if (node.name === 'slot') {
 						component.error(node, {
-							code: `invalid-prop`,
-							message: `'slot' is reserved for future use in named slots`
+							code: 'invalid-prop',
+							message: "'slot' is reserved for future use in named slots"
 						});
 					}
 					// fallthrough
@@ -62,8 +62,8 @@ export default class InlineComponent extends Node {
 
 				case 'Class':
 					component.error(node, {
-						code: `invalid-class`,
-						message: `Classes can only be applied to DOM elements, not components`
+						code: 'invalid-class',
+						message: 'Classes can only be applied to DOM elements, not components'
 					});
 
 				case 'EventHandler':
@@ -76,8 +76,8 @@ export default class InlineComponent extends Node {
 
 				case 'Transition':
 					component.error(node, {
-						code: `invalid-transition`,
-						message: `Transitions can only be applied to DOM elements, not components`
+						code: 'invalid-transition',
+						message: 'Transitions can only be applied to DOM elements, not components'
 					});
 
 				default:
@@ -105,7 +105,7 @@ export default class InlineComponent extends Node {
 				if (modifier !== 'once') {
 					component.error(handler, {
 						code: 'invalid-event-modifier',
-						message: `Event modifiers other than 'once' can only be used on DOM elements`
+						message: "Event modifiers other than 'once' can only be used on DOM elements"
 					});
 				}
 			});
diff --git a/src/compiler/compile/nodes/KeyBlock.ts b/src/compiler/compile/nodes/KeyBlock.ts
index 356210b6b0..e1a00a342e 100644
--- a/src/compiler/compile/nodes/KeyBlock.ts
+++ b/src/compiler/compile/nodes/KeyBlock.ts
@@ -1,9 +1,9 @@
-import Expression from "./shared/Expression";
-import map_children from "./shared/map_children";
-import AbstractBlock from "./shared/AbstractBlock";
+import Expression from './shared/Expression';
+import map_children from './shared/map_children';
+import AbstractBlock from './shared/AbstractBlock';
 
 export default class KeyBlock extends AbstractBlock {
-	type: "KeyBlock";
+	type: 'KeyBlock';
 
 	expression: Expression;
 
diff --git a/src/compiler/compile/nodes/Let.ts b/src/compiler/compile/nodes/Let.ts
index ef38cd36a8..77c344ee6d 100644
--- a/src/compiler/compile/nodes/Let.ts
+++ b/src/compiler/compile/nodes/Let.ts
@@ -26,7 +26,7 @@ export default class Let extends Node {
 					if (!applicable.has(node.type)) {
 						component.error(node as any, {
 							code: 'invalid-let',
-							message: `let directive value must be an identifier or an object/array pattern`
+							message: 'let directive value must be an identifier or an object/array pattern'
 						});
 					}
 
diff --git a/src/compiler/compile/nodes/Slot.ts b/src/compiler/compile/nodes/Slot.ts
index a03fe8c026..87b6c1ea91 100644
--- a/src/compiler/compile/nodes/Slot.ts
+++ b/src/compiler/compile/nodes/Slot.ts
@@ -17,24 +17,24 @@ export default class Slot extends Element {
 		info.attributes.forEach(attr => {
 			if (attr.type !== 'Attribute') {
 				component.error(attr, {
-					code: `invalid-slot-directive`,
-					message: `<slot> cannot have directives`
+					code: 'invalid-slot-directive',
+					message: '<slot> cannot have directives'
 				});
 			}
 
 			if (attr.name === 'name') {
 				if (attr.value.length !== 1 || attr.value[0].type !== 'Text') {
 					component.error(attr, {
-						code: `dynamic-slot-name`,
-						message: `<slot> name cannot be dynamic`
+						code: 'dynamic-slot-name',
+						message: '<slot> name cannot be dynamic'
 					});
 				}
 
 				this.slot_name = attr.value[0].data;
 				if (this.slot_name === 'default') {
 					component.error(attr, {
-						code: `invalid-slot-name`,
-						message: `default is a reserved word — it cannot be used as a slot name`
+						code: 'invalid-slot-name',
+						message: 'default is a reserved word — it cannot be used as a slot name'
 					});
 				}
 			}
diff --git a/src/compiler/compile/nodes/Text.ts b/src/compiler/compile/nodes/Text.ts
index 142487e1c3..a4f26e7e9d 100644
--- a/src/compiler/compile/nodes/Text.ts
+++ b/src/compiler/compile/nodes/Text.ts
@@ -37,7 +37,7 @@ export default class Text extends Node {
 
 		// svg namespace exclusions
 		if (/svg$/.test(parent_element.namespace)) {
-			if (this.prev && this.prev.type === "Element" && this.prev.name === "tspan") return false;
+			if (this.prev && this.prev.type === 'Element' && this.prev.name === 'tspan') return false;
 		}
 
 		return parent_element.namespace || elements_without_text.has(parent_element.name);
diff --git a/src/compiler/compile/nodes/Title.ts b/src/compiler/compile/nodes/Title.ts
index 6ac0848053..ec1b7fe922 100644
--- a/src/compiler/compile/nodes/Title.ts
+++ b/src/compiler/compile/nodes/Title.ts
@@ -13,8 +13,8 @@ export default class Title extends Node {
 
 		if (info.attributes.length > 0) {
 			component.error(info.attributes[0], {
-				code: `illegal-attribute`,
-				message: `<title> cannot have attributes`
+				code: 'illegal-attribute',
+				message: '<title> cannot have attributes'
 			});
 		}
 
@@ -22,7 +22,7 @@ export default class Title extends Node {
 			if (child.type !== 'Text' && child.type !== 'MustacheTag') {
 				component.error(child, {
 					code: 'illegal-structure',
-					message: `<title> can only contain text and {tags}`
+					message: '<title> can only contain text and {tags}'
 				});
 			}
 		});
diff --git a/src/compiler/compile/nodes/Transition.ts b/src/compiler/compile/nodes/Transition.ts
index 983a6ee6c7..a01931d63c 100644
--- a/src/compiler/compile/nodes/Transition.ts
+++ b/src/compiler/compile/nodes/Transition.ts
@@ -28,7 +28,7 @@ export default class Transition extends Node {
 				: `An element cannot have both ${describe(parent_transition)} directive and ${describe(this)} directive`;
 
 			component.error(info, {
-				code: `duplicate-transition`,
+				code: 'duplicate-transition',
 				message
 			});
 		}
@@ -41,6 +41,6 @@ export default class Transition extends Node {
 
 function describe(transition: Transition) {
 	return transition.directive === 'transition'
-		? `a 'transition'`
+		? "a 'transition'"
 		: `an '${transition.directive}'`;
 }
\ No newline at end of file
diff --git a/src/compiler/compile/nodes/Window.ts b/src/compiler/compile/nodes/Window.ts
index d1e61fb1fc..d0ad313c6f 100644
--- a/src/compiler/compile/nodes/Window.ts
+++ b/src/compiler/compile/nodes/Window.ts
@@ -36,7 +36,7 @@ export default class Window extends Node {
 
 					// TODO is this constraint necessary?
 					component.error(node.expression, {
-						code: `invalid-binding`,
+						code: 'invalid-binding',
 						message: `Bindings on <svelte:window> must be to top-level properties, e.g. '${parts[parts.length - 1]}' rather than '${parts.join('.')}'`
 					});
 				}
@@ -52,12 +52,12 @@ export default class Window extends Node {
 
 					if (match) {
 						component.error(node, {
-							code: `invalid-binding`,
+							code: 'invalid-binding',
 							message: `${message} (did you mean '${match}'?)`
 						});
 					} else {
 						component.error(node, {
-							code: `invalid-binding`,
+							code: 'invalid-binding',
 							message: `${message} — valid bindings are ${list(valid_bindings)}`
 						});
 					}
diff --git a/src/compiler/compile/nodes/shared/Expression.ts b/src/compiler/compile/nodes/shared/Expression.ts
index 834287bb63..027e962e29 100644
--- a/src/compiler/compile/nodes/shared/Expression.ts
+++ b/src/compiler/compile/nodes/shared/Expression.ts
@@ -85,8 +85,8 @@ export default class Expression {
 						const store_name = name.slice(1);
 						if (template_scope.names.has(store_name) || scope.has(store_name)) {
 							component.error(node, {
-								code: `contextual-store`,
-								message: `Stores must be declared at the top level of the component (this may change in a future version of Svelte)`
+								code: 'contextual-store',
+								message: 'Stores must be declared at the top level of the component (this may change in a future version of Svelte)'
 							});
 						}
 					}
diff --git a/src/compiler/compile/render_dom/Renderer.ts b/src/compiler/compile/render_dom/Renderer.ts
index 0990281d91..fb04be1574 100644
--- a/src/compiler/compile/render_dom/Renderer.ts
+++ b/src/compiler/compile/render_dom/Renderer.ts
@@ -235,7 +235,7 @@ export default class Renderer {
 				if (!member) return;
 
 				if (member.index.value === -1) {
-					throw new Error(`unset index`);
+					throw new Error('unset index');
 				}
 
 				const value = member.index.value as number;
diff --git a/src/compiler/compile/render_dom/index.ts b/src/compiler/compile/render_dom/index.ts
index ab4ee904e8..6380843b87 100644
--- a/src/compiler/compile/render_dom/index.ts
+++ b/src/compiler/compile/render_dom/index.ts
@@ -81,7 +81,7 @@ export default function dom(
 
 	const uses_props = component.var_lookup.has('$$props');
 	const uses_rest = component.var_lookup.has('$$restProps');
-	const $$props = uses_props || uses_rest ? `$$new_props` : `$$props`;
+	const $$props = uses_props || uses_rest ? '$$new_props' : '$$props';
 	const props = component.vars.filter(variable => !variable.module && variable.export_name);
 	const writable_props = props.filter(variable => variable.writable);
 
@@ -524,7 +524,7 @@ export default function dom(
 		const declaration = b`
 			class ${name} extends ${superclass} {
 				constructor(options) {
-					super(${options.dev && `options`});
+					super(${options.dev && 'options'});
 					${should_add_css && b`if (!@_document.getElementById("${component.stylesheet.id}-style")) ${add_css}();`}
 					@init(this, options, ${definition}, ${has_create_fragment ? 'create_fragment': 'null'}, ${not_equal}, ${prop_indexes}, ${dirty});
 					${options.dev && b`@dispatch_dev("SvelteRegisterComponent", { component: this, tagName: "${name.name}", options, id: create_fragment.name });`}
diff --git a/src/compiler/compile/render_dom/wrappers/AwaitBlock.ts b/src/compiler/compile/render_dom/wrappers/AwaitBlock.ts
index e890715692..2bdc31948d 100644
--- a/src/compiler/compile/render_dom/wrappers/AwaitBlock.ts
+++ b/src/compiler/compile/render_dom/wrappers/AwaitBlock.ts
@@ -177,8 +177,8 @@ export default class AwaitBlockWrapper extends Wrapper {
 
 		const snippet = this.node.expression.manipulate(block);
 
-		const info = block.get_unique_name(`info`);
-		const promise = block.get_unique_name(`promise`);
+		const info = block.get_unique_name('info');
+		const promise = block.get_unique_name('promise');
 
 		block.add_variable(promise);
 
diff --git a/src/compiler/compile/render_dom/wrappers/EachBlock.ts b/src/compiler/compile/render_dom/wrappers/EachBlock.ts
index fe1c21a8df..b31d2bcba7 100644
--- a/src/compiler/compile/render_dom/wrappers/EachBlock.ts
+++ b/src/compiler/compile/render_dom/wrappers/EachBlock.ts
@@ -29,7 +29,7 @@ export class ElseBlockWrapper extends Wrapper {
 
 		this.block = block.child({
 			comment: create_debugging_comment(node, this.renderer.component),
-			name: this.renderer.component.get_unique_name(`create_else_block`),
+			name: this.renderer.component.get_unique_name('create_else_block'),
 			type: 'else'
 		});
 
@@ -441,11 +441,11 @@ export default class EachBlockWrapper extends Wrapper {
 
 		const destroy = this.node.has_animation
 			? (this.block.has_outros
-				? `@fix_and_outro_and_destroy_block`
-				: `@fix_and_destroy_block`)
+				? '@fix_and_outro_and_destroy_block'
+				: '@fix_and_destroy_block')
 			: this.block.has_outros
-				? `@outro_and_destroy_block`
-				: `@destroy_block`;
+				? '@outro_and_destroy_block'
+				: '@destroy_block';
 
 		if (this.dependencies.size) {
 			this.updates.push(b`
@@ -563,7 +563,7 @@ export default class EachBlockWrapper extends Wrapper {
 						}
 					`;
 
-			const start = this.block.has_update_method ? 0 : `#old_length`;
+			const start = this.block.has_update_method ? 0 : '#old_length';
 
 			let remove_old_blocks;
 
diff --git a/src/compiler/compile/render_dom/wrappers/Element/Attribute.ts b/src/compiler/compile/render_dom/wrappers/Element/Attribute.ts
index f2e760c7de..258376c375 100644
--- a/src/compiler/compile/render_dom/wrappers/Element/Attribute.ts
+++ b/src/compiler/compile/render_dom/wrappers/Element/Attribute.ts
@@ -187,7 +187,7 @@ export default class AttributeWrapper extends BaseAttributeWrapper {
 		if (this.is_input_value) {
 			const type = element.node.get_static_attribute_value('type');
 
-			if (type === null || type === "" || type === "text" || type === "email" || type === "password") {
+			if (type === null || type === '' || type === 'text' || type === 'email' || type === 'password') {
 				condition = x`${condition} && ${element.var}.${property_name} !== ${should_cache ? last : value}`;
 			}
 		}
@@ -277,7 +277,7 @@ export default class AttributeWrapper extends BaseAttributeWrapper {
 		if (this.node.is_true) return '';
 
 		const value = this.node.chunks;
-		if (value.length === 0) return `=""`;
+		if (value.length === 0) return '=""';
 
 		return `="${value.map(chunk => {
 			return chunk.type === 'Text'
diff --git a/src/compiler/compile/render_dom/wrappers/Element/Binding.ts b/src/compiler/compile/render_dom/wrappers/Element/Binding.ts
index 609ae054b2..de070aa5c9 100644
--- a/src/compiler/compile/render_dom/wrappers/Element/Binding.ts
+++ b/src/compiler/compile/render_dom/wrappers/Element/Binding.ts
@@ -88,20 +88,20 @@ export default class BindingWrapper {
 			update_conditions.push(block.renderer.dirty(dependency_array));
 		}
 
-		if (parent.node.name === "input") {
-			const type = parent.node.get_static_attribute_value("type");
+		if (parent.node.name === 'input') {
+			const type = parent.node.get_static_attribute_value('type');
 
 			if (
 				type === null ||
-				type === "" ||
-				type === "text" ||
-				type === "email" ||
-				type === "password"
+				type === '' ||
+				type === 'text' ||
+				type === 'email' ||
+				type === 'password'
 			) {
 				update_conditions.push(
 					x`${parent.var}.${this.node.name} !== ${this.snippet}`
 				);
-			} else if (type === "number") {
+			} else if (type === 'number') {
 				update_conditions.push(
 					x`@to_number(${parent.var}.${this.node.name}) !== ${this.snippet}`
 				);
@@ -118,7 +118,7 @@ export default class BindingWrapper {
 			{
 				const { binding_group, is_context, contexts, index } = get_binding_group(parent.renderer, this.node, block);
 
-				block.renderer.add_to_context(`$$binding_groups`);
+				block.renderer.add_to_context('$$binding_groups');
 
 				if (is_context) {
 					if (contexts.length > 1) {
diff --git a/src/compiler/compile/render_dom/wrappers/Element/SpreadAttribute.ts b/src/compiler/compile/render_dom/wrappers/Element/SpreadAttribute.ts
index a47ddc892b..2be346c15a 100644
--- a/src/compiler/compile/render_dom/wrappers/Element/SpreadAttribute.ts
+++ b/src/compiler/compile/render_dom/wrappers/Element/SpreadAttribute.ts
@@ -1,3 +1,3 @@
-import { BaseAttributeWrapper } from "./Attribute";
+import { BaseAttributeWrapper } from './Attribute';
 
 export default class SpreadAttributeWrapper extends BaseAttributeWrapper {}
diff --git a/src/compiler/compile/render_dom/wrappers/Element/handle_select_value_binding.ts b/src/compiler/compile/render_dom/wrappers/Element/handle_select_value_binding.ts
index 93a83298f8..ff6e0a39ee 100644
--- a/src/compiler/compile/render_dom/wrappers/Element/handle_select_value_binding.ts
+++ b/src/compiler/compile/render_dom/wrappers/Element/handle_select_value_binding.ts
@@ -1,13 +1,13 @@
-import AttributeWrapper from "./Attribute";
-import BindingWrapper from "./Binding";
-import ElementWrapper from "./index";
+import AttributeWrapper from './Attribute';
+import BindingWrapper from './Binding';
+import ElementWrapper from './index';
 
 export default function handle_select_value_binding(
 	attr: AttributeWrapper | BindingWrapper,
 	dependencies: Set<string>
 ) {
 	const { parent } = attr;
-	if (parent.node.name === "select") {
+	if (parent.node.name === 'select') {
 		(parent as ElementWrapper).select_binding_dependencies = dependencies;
 		dependencies.forEach((prop: string) => {
 			parent.renderer.component.indirect_dependencies.set(prop, new Set());
diff --git a/src/compiler/compile/render_dom/wrappers/Element/index.ts b/src/compiler/compile/render_dom/wrappers/Element/index.ts
index b99df5242c..c6b88357a8 100644
--- a/src/compiler/compile/render_dom/wrappers/Element/index.ts
+++ b/src/compiler/compile/render_dom/wrappers/Element/index.ts
@@ -685,7 +685,7 @@ export default class ElementWrapper extends Wrapper {
 			`);
 		} else if (this.node.name === 'input' && this.attributes.find(attr => attr.node.name === 'value')) {
 			const type = this.node.get_static_attribute_value('type');
-			if (type === null || type === "" || type === "text" || type === "email" || type === "password") {
+			if (type === null || type === '' || type === 'text' || type === 'email' || type === 'password') {
 				block.chunks.mount.push(b`
 					${this.var}.value = ${data}.value;
 				`);
@@ -956,7 +956,7 @@ function to_html(wrappers: Array<ElementWrapper | TextWrapper | MustacheTagWrapp
 					}
 				});
 
-				state.quasi.value.raw += `"`;
+				state.quasi.value.raw += '"';
 			});
 
 			if (!wrapper.void) {
diff --git a/src/compiler/compile/render_dom/wrappers/Fragment.ts b/src/compiler/compile/render_dom/wrappers/Fragment.ts
index 853a41f3cc..6b7ff56e64 100644
--- a/src/compiler/compile/render_dom/wrappers/Fragment.ts
+++ b/src/compiler/compile/render_dom/wrappers/Fragment.ts
@@ -69,7 +69,7 @@ export default class FragmentWrapper {
 			const child = nodes[i];
 
 			if (!child.type) {
-				throw new Error(`missing type`);
+				throw new Error('missing type');
 			}
 
 			if (!(child.type in wrappers)) {
diff --git a/src/compiler/compile/render_dom/wrappers/IfBlock.ts b/src/compiler/compile/render_dom/wrappers/IfBlock.ts
index 6eb7ec29c7..0cb31036e6 100644
--- a/src/compiler/compile/render_dom/wrappers/IfBlock.ts
+++ b/src/compiler/compile/render_dom/wrappers/IfBlock.ts
@@ -55,7 +55,7 @@ class IfBlockBranch extends Wrapper {
 			});
 
 			if (should_cache) {
-				this.condition = block.get_unique_name(`show_if`);
+				this.condition = block.get_unique_name('show_if');
 				this.snippet = (expression.manipulate(block) as Node);
 			} else {
 				this.condition = expression.manipulate(block);
@@ -65,7 +65,7 @@ class IfBlockBranch extends Wrapper {
 		this.block = block.child({
 			comment: create_debugging_comment(node, parent.renderer.component),
 			name: parent.renderer.component.get_unique_name(
-				is_else ? `create_else_block` : `create_if_block`
+				is_else ? 'create_else_block' : 'create_if_block'
 			),
 			type: (node as IfBlock).expression ? 'if' : 'else'
 		});
@@ -257,8 +257,8 @@ export default class IfBlockWrapper extends Wrapper {
 		{ name, anchor, has_else, if_exists_condition, has_transitions },
 		detaching
 	) {
-		const select_block_type = this.renderer.component.get_unique_name(`select_block_type`);
-		const current_block_type = block.get_unique_name(`current_block_type`);
+		const select_block_type = this.renderer.component.get_unique_name('select_block_type');
+		const current_block_type = block.get_unique_name('current_block_type');
 		const get_block = has_else
 			? x`${current_block_type}(#ctx)`
 			: x`${current_block_type} && ${current_block_type}(#ctx)`;
@@ -364,11 +364,11 @@ export default class IfBlockWrapper extends Wrapper {
 		{ name, anchor, has_else, has_transitions, if_exists_condition },
 		detaching
 	) {
-		const select_block_type = this.renderer.component.get_unique_name(`select_block_type`);
-		const current_block_type_index = block.get_unique_name(`current_block_type_index`);
-		const previous_block_index = block.get_unique_name(`previous_block_index`);
-		const if_block_creators = block.get_unique_name(`if_block_creators`);
-		const if_blocks = block.get_unique_name(`if_blocks`);
+		const select_block_type = this.renderer.component.get_unique_name('select_block_type');
+		const current_block_type_index = block.get_unique_name('current_block_type_index');
+		const previous_block_index = block.get_unique_name('previous_block_index');
+		const if_block_creators = block.get_unique_name('if_block_creators');
+		const if_blocks = block.get_unique_name('if_blocks');
 
 		const if_current_block_type_index = has_else
 			? nodes => nodes
diff --git a/src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts b/src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts
index 81ec652846..be3d6d146d 100644
--- a/src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts
+++ b/src/compiler/compile/render_dom/wrappers/InlineComponent/index.ts
@@ -78,7 +78,7 @@ export default class InlineComponentWrapper extends Wrapper {
 
 			const default_slot = block.child({
 				comment: create_debugging_comment(node, renderer.component),
-				name: renderer.component.get_unique_name(`create_default_slot`),
+				name: renderer.component.get_unique_name('create_default_slot'),
 				type: 'slot'
 			});
 
diff --git a/src/compiler/compile/render_dom/wrappers/KeyBlock.ts b/src/compiler/compile/render_dom/wrappers/KeyBlock.ts
index 359fb6946f..9688337d7c 100644
--- a/src/compiler/compile/render_dom/wrappers/KeyBlock.ts
+++ b/src/compiler/compile/render_dom/wrappers/KeyBlock.ts
@@ -1,19 +1,19 @@
-import Wrapper from "./shared/Wrapper";
-import Renderer from "../Renderer";
-import Block from "../Block";
-import EachBlock from "../../nodes/EachBlock";
-import KeyBlock from "../../nodes/KeyBlock";
-import create_debugging_comment from "./shared/create_debugging_comment";
-import FragmentWrapper from "./Fragment";
-import { b, x } from "code-red";
-import { Identifier } from "estree";
+import Wrapper from './shared/Wrapper';
+import Renderer from '../Renderer';
+import Block from '../Block';
+import EachBlock from '../../nodes/EachBlock';
+import KeyBlock from '../../nodes/KeyBlock';
+import create_debugging_comment from './shared/create_debugging_comment';
+import FragmentWrapper from './Fragment';
+import { b, x } from 'code-red';
+import { Identifier } from 'estree';
 
 export default class KeyBlockWrapper extends Wrapper {
 	node: KeyBlock;
 	fragment: FragmentWrapper;
 	block: Block;
 	dependencies: string[];
-	var: Identifier = { type: "Identifier", name: "key_block" };
+	var: Identifier = { type: 'Identifier', name: 'key_block' };
 
 	constructor(
 		renderer: Renderer,
@@ -33,8 +33,8 @@ export default class KeyBlockWrapper extends Wrapper {
 		if (this.dependencies.length) {
 			block = block.child({
 				comment: create_debugging_comment(node, renderer.component),
-				name: renderer.component.get_unique_name("create_key_block"),
-				type: "key"
+				name: renderer.component.get_unique_name('create_key_block'),
+				type: 'key'
 			});
 			renderer.blocks.push(block);
 		}
@@ -89,8 +89,8 @@ export default class KeyBlockWrapper extends Wrapper {
 			block.chunks.claim.push(b`${this.var}.l(${parent_nodes});`);
 		}
 		block.chunks.mount.push(
-			b`${this.var}.m(${parent_node || "#target"}, ${
-				parent_node ? "null" : "#anchor"
+			b`${this.var}.m(${parent_node || '#target'}, ${
+				parent_node ? 'null' : '#anchor'
 			});`
 		);
 		const anchor = this.get_or_create_anchor(block, parent_node, parent_nodes);
diff --git a/src/compiler/compile/render_dom/wrappers/Slot.ts b/src/compiler/compile/render_dom/wrappers/Slot.ts
index 4f8e0c8e57..0746de3237 100644
--- a/src/compiler/compile/render_dom/wrappers/Slot.ts
+++ b/src/compiler/compile/render_dom/wrappers/Slot.ts
@@ -38,7 +38,7 @@ export default class SlotWrapper extends Wrapper {
 		if (this.node.children.length) {
 			this.fallback = block.child({
 				comment: create_debugging_comment(this.node.children[0], this.renderer.component),
-				name: this.renderer.component.get_unique_name(`fallback_block`),
+				name: this.renderer.component.get_unique_name('fallback_block'),
 				type: 'fallback'
 			});
 			renderer.blocks.push(this.fallback);
diff --git a/src/compiler/compile/render_dom/wrappers/Title.ts b/src/compiler/compile/render_dom/wrappers/Title.ts
index 428073ddd2..808384fabb 100644
--- a/src/compiler/compile/render_dom/wrappers/Title.ts
+++ b/src/compiler/compile/render_dom/wrappers/Title.ts
@@ -59,7 +59,7 @@ export default class TitleWrapper extends Wrapper {
 			}
 
 			const last = this.node.should_cache && block.get_unique_name(
-				`title_value`
+				'title_value'
 			);
 
 			if (this.node.should_cache) block.add_variable(last);
diff --git a/src/compiler/compile/render_dom/wrappers/Window.ts b/src/compiler/compile/render_dom/wrappers/Window.ts
index 14c8778ccb..dbc7efd891 100644
--- a/src/compiler/compile/render_dom/wrappers/Window.ts
+++ b/src/compiler/compile/render_dom/wrappers/Window.ts
@@ -72,9 +72,9 @@ export default class WindowWrapper extends Wrapper {
 			});
 		});
 
-		const scrolling = block.get_unique_name(`scrolling`);
-		const clear_scrolling = block.get_unique_name(`clear_scrolling`);
-		const scrolling_timeout = block.get_unique_name(`scrolling_timeout`);
+		const scrolling = block.get_unique_name('scrolling');
+		const clear_scrolling = block.get_unique_name('clear_scrolling');
+		const scrolling_timeout = block.get_unique_name('scrolling_timeout');
 
 		Object.keys(events).forEach(event => {
 			const id = block.get_unique_name(`onwindow${event}`);
@@ -156,7 +156,7 @@ export default class WindowWrapper extends Wrapper {
 
 		// another special case. (I'm starting to think these are all special cases.)
 		if (bindings.online) {
-			const id = block.get_unique_name(`onlinestatuschanged`);
+			const id = block.get_unique_name('onlinestatuschanged');
 			const name = bindings.online;
 
 			renderer.add_to_context(id.name);
diff --git a/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts b/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts
index 884d4b88b8..76a594c09c 100644
--- a/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts
+++ b/src/compiler/compile/render_dom/wrappers/shared/mark_each_block_bindings.ts
@@ -1,7 +1,7 @@
-import EachBlock from "../../../nodes/EachBlock";
-import InlineComponentWrapper from "../InlineComponent";
-import ElementWrapper from "../Element";
-import Binding from "../../../nodes/Binding";
+import EachBlock from '../../../nodes/EachBlock';
+import InlineComponentWrapper from '../InlineComponent';
+import ElementWrapper from '../Element';
+import Binding from '../../../nodes/Binding';
 
 export default function mark_each_block_bindings(
 	parent: ElementWrapper | InlineComponentWrapper,
@@ -16,7 +16,7 @@ export default function mark_each_block_bindings(
 		}
 	});
 
-	if (binding.name === "group") {
+	if (binding.name === 'group') {
 		// for `<input bind:group={} >`, we make sure that all the each blocks creates context with `index`
 		for (const name of binding.expression.contextual_dependencies) {
 			const each_block = parent.node.scope.get_owner(name);
diff --git a/src/compiler/compile/render_ssr/handlers/Element.ts b/src/compiler/compile/render_ssr/handlers/Element.ts
index ad5c421bc4..163e2bbea9 100644
--- a/src/compiler/compile/render_ssr/handlers/Element.ts
+++ b/src/compiler/compile/render_ssr/handlers/Element.ts
@@ -84,20 +84,20 @@ export default function(node: Element, renderer: Renderer, options: RenderOption
 				attribute.chunks[0].type !== 'Text'
 			) {
 				// a boolean attribute with one non-Text chunk
-				renderer.add_string(` `);
+				renderer.add_string(' ');
 				renderer.add_expression(x`${(attribute.chunks[0] as Expression).node} ? "${attribute.name}" : ""`);
 			} else if (name === 'class' && class_expression) {
 				add_class_attribute = false;
 				renderer.add_string(` ${attribute.name}="`);
 				renderer.add_expression(x`[${get_class_attribute_value(attribute)}, ${class_expression}].join(' ').trim()`);
-				renderer.add_string(`"`);
+				renderer.add_string('"');
 			} else if (attribute.chunks.length === 1 && attribute.chunks[0].type !== 'Text') {
 				const snippet = (attribute.chunks[0] as Expression).node;
 				renderer.add_expression(x`@add_attribute("${attribute.name}", ${snippet}, ${boolean_attributes.has(name) ? 1 : 0})`);
 			} else {
 				renderer.add_string(` ${attribute.name}="`);
 				renderer.add_expression((name === 'class' ? get_class_attribute_value : get_attribute_value)(attribute));
-				renderer.add_string(`"`);
+				renderer.add_string('"');
 			}
 		});
 		if (add_class_attribute) {
diff --git a/src/compiler/compile/render_ssr/handlers/InlineComponent.ts b/src/compiler/compile/render_ssr/handlers/InlineComponent.ts
index 37f05a941c..071495eada 100644
--- a/src/compiler/compile/render_ssr/handlers/InlineComponent.ts
+++ b/src/compiler/compile/render_ssr/handlers/InlineComponent.ts
@@ -104,6 +104,6 @@ function is_empty_template_literal(template_literal) {
 	return (
 		template_literal.expressions.length === 0 &&
 		template_literal.quasis.length === 1 &&
-		template_literal.quasis[0].value.raw === ""
+		template_literal.quasis[0].value.raw === ''
 	);
 }
\ No newline at end of file
diff --git a/src/compiler/compile/render_ssr/handlers/Title.ts b/src/compiler/compile/render_ssr/handlers/Title.ts
index c4c7897185..9fe48dd1f1 100644
--- a/src/compiler/compile/render_ssr/handlers/Title.ts
+++ b/src/compiler/compile/render_ssr/handlers/Title.ts
@@ -5,11 +5,11 @@ import { x } from 'code-red';
 export default function(node: Title, renderer: Renderer, options: RenderOptions) {
 	renderer.push();
 
-	renderer.add_string(`<title>`);
+	renderer.add_string('<title>');
 
 	renderer.render(node.children, options);
 
-	renderer.add_string(`</title>`);
+	renderer.add_string('</title>');
 	const result = renderer.pop();
 
 	renderer.add_expression(x`$$result.title = ${result}, ""`);
diff --git a/src/compiler/compile/utils/compare_node.ts b/src/compiler/compile/utils/compare_node.ts
index ead79a5ea0..a5ff42dc82 100644
--- a/src/compiler/compile/utils/compare_node.ts
+++ b/src/compiler/compile/utils/compare_node.ts
@@ -1,13 +1,13 @@
-import { Node, Literal, Identifier, MemberExpression } from "estree";
+import { Node, Literal, Identifier, MemberExpression } from 'estree';
 
 export function compare_node(a: Node | void, b: Node | void) {
 	if (a === b) return true;
 	if (!a || !b) return false;
 	if (a.type !== b.type) return false;
 	switch (a.type) {
-		case "Identifier":
+		case 'Identifier':
 			return a.name === (b as Identifier).name;
-		case "MemberExpression":
+		case 'MemberExpression':
 			return (
 				compare_node(a.object, (b as MemberExpression).object) &&
 				compare_node(a.property, (b as MemberExpression).property) &&
diff --git a/src/compiler/compile/utils/get_name_from_filename.ts b/src/compiler/compile/utils/get_name_from_filename.ts
index d1e0e167ce..d144c1749b 100644
--- a/src/compiler/compile/utils/get_name_from_filename.ts
+++ b/src/compiler/compile/utils/get_name_from_filename.ts
@@ -13,7 +13,7 @@ export default function get_name_from_filename(filename: string) {
 
 	const base = parts.pop()
 		.replace(/%/g, 'u')
-		.replace(/\.[^.]+$/, "")
+		.replace(/\.[^.]+$/, '')
 		.replace(/[^a-zA-Z_$0-9]+/g, '_')
 		.replace(/^_/, '')
 		.replace(/_$/, '')
diff --git a/src/compiler/compile/utils/hash.ts b/src/compiler/compile/utils/hash.ts
index e10013aca2..4ead475dbc 100644
--- a/src/compiler/compile/utils/hash.ts
+++ b/src/compiler/compile/utils/hash.ts
@@ -1,6 +1,6 @@
 // https://github.com/darkskyapp/string-hash/blob/master/index.js
 export default function hash(str: string): string {
-	str = str.replace(/\r/g, "");
+	str = str.replace(/\r/g, '');
 	let hash = 5381;
 	let i = str.length;
 
diff --git a/src/compiler/compile/utils/reserved_keywords.ts b/src/compiler/compile/utils/reserved_keywords.ts
index d6eb8b9673..2a9375233b 100644
--- a/src/compiler/compile/utils/reserved_keywords.ts
+++ b/src/compiler/compile/utils/reserved_keywords.ts
@@ -1,4 +1,4 @@
-export const reserved_keywords = new Set(["$$props", "$$restProps", "$$slots"]);
+export const reserved_keywords = new Set(['$$props', '$$restProps', '$$slots']);
 
 export function is_reserved_keyword(name) {
 	return reserved_keywords.has(name);
diff --git a/src/compiler/compile/utils/string_to_member_expression.ts b/src/compiler/compile/utils/string_to_member_expression.ts
index 78f8678e1e..783571b035 100644
--- a/src/compiler/compile/utils/string_to_member_expression.ts
+++ b/src/compiler/compile/utils/string_to_member_expression.ts
@@ -1,16 +1,16 @@
-import { MemberExpression, Identifier } from "estree";
+import { MemberExpression, Identifier } from 'estree';
 
 export function string_to_member_expression(name: string) {
-	const parts = name.split(".");
+	const parts = name.split('.');
 	let node: MemberExpression | Identifier = {
-		type: "Identifier",
+		type: 'Identifier',
 		name: parts[0]
 	};
 	for (let i = 1; i < parts.length; i++) {
 		node = {
-			type: "MemberExpression",
+			type: 'MemberExpression',
 			object: node,
-			property: { type: "Identifier", name: parts[i] }
+			property: { type: 'Identifier', name: parts[i] }
 		} as MemberExpression;
 	}
 	return node;
diff --git a/src/compiler/interfaces.ts b/src/compiler/interfaces.ts
index d454a3fff6..5249c2fd48 100644
--- a/src/compiler/interfaces.ts
+++ b/src/compiler/interfaces.ts
@@ -1,4 +1,4 @@
-import { Node, Program } from "estree";
+import { Node, Program } from 'estree';
 import { SourceMap } from 'magic-string';
 
 interface BaseNode {
diff --git a/src/compiler/parse/index.ts b/src/compiler/parse/index.ts
index c41bd04518..ba083af4de 100644
--- a/src/compiler/parse/index.ts
+++ b/src/compiler/parse/index.ts
@@ -66,7 +66,7 @@ export class Parser {
 
 		if (state !== fragment) {
 			this.error({
-				code: `unexpected-eof`,
+				code: 'unexpected-eof',
 				message: 'Unexpected end of input'
 			});
 		}
@@ -91,7 +91,7 @@ export class Parser {
 
 	acorn_error(err: any) {
 		this.error({
-			code: `parse-error`,
+			code: 'parse-error',
 			message: err.message.replace(/ \(\d+:\d+\)$/, '')
 		}, err.pos);
 	}
@@ -169,7 +169,7 @@ export class Parser {
 
 		if (!allow_reserved && reserved.has(identifier)) {
 			this.error({
-				code: `unexpected-reserved-word`,
+				code: 'unexpected-reserved-word',
 				message: `'${identifier}' is a reserved word in JavaScript and cannot be used here`
 			}, start);
 		}
@@ -180,7 +180,7 @@ export class Parser {
 	read_until(pattern: RegExp) {
 		if (this.index >= this.template.length)
 			this.error({
-				code: `unexpected-eof`,
+				code: 'unexpected-eof',
 				message: 'Unexpected end of input'
 			});
 
@@ -199,8 +199,8 @@ export class Parser {
 	require_whitespace() {
 		if (!whitespace.test(this.template[this.index])) {
 			this.error({
-				code: `missing-whitespace`,
-				message: `Expected whitespace`
+				code: 'missing-whitespace',
+				message: 'Expected whitespace'
 			});
 		}
 
@@ -228,15 +228,15 @@ export default function parse(
 
 	if (instance_scripts.length > 1) {
 		parser.error({
-			code: `invalid-script`,
-			message: `A component can only have one instance-level <script> element`
+			code: 'invalid-script',
+			message: 'A component can only have one instance-level <script> element'
 		}, instance_scripts[1].start);
 	}
 
 	if (module_scripts.length > 1) {
 		parser.error({
-			code: `invalid-script`,
-			message: `A component can only have one <script context="module"> element`
+			code: 'invalid-script',
+			message: 'A component can only have one <script context="module"> element'
 		}, module_scripts[1].start);
 	}
 
diff --git a/src/compiler/parse/read/context.ts b/src/compiler/parse/read/context.ts
index 8d28bd2024..a11dfb25c5 100644
--- a/src/compiler/parse/read/context.ts
+++ b/src/compiler/parse/read/context.ts
@@ -1,14 +1,14 @@
-import { Parser } from "../index";
-import { isIdentifierStart } from "acorn";
-import full_char_code_at from "../../utils/full_char_code_at";
+import { Parser } from '../index';
+import { isIdentifierStart } from 'acorn';
+import full_char_code_at from '../../utils/full_char_code_at';
 import {
 	is_bracket_open,
 	is_bracket_close,
 	is_bracket_pair,
 	get_bracket_close
-} from "../utils/bracket";
-import { parse_expression_at } from "../acorn";
-import { Pattern } from "estree";
+} from '../utils/bracket';
+import { parse_expression_at } from '../acorn';
+import { Pattern } from 'estree';
 
 export default function read_context(
 	parser: Parser
@@ -19,7 +19,7 @@ export default function read_context(
 	const code = full_char_code_at(parser.template, i);
 	if (isIdentifierStart(code, true)) {
 		return {
-			type: "Identifier",
+			type: 'Identifier',
 			name: parser.read_identifier(),
 			start,
 			end: parser.index
@@ -28,8 +28,8 @@ export default function read_context(
 
 	if (!is_bracket_open(code)) {
 		parser.error({
-			code: "unexpected-token",
-			message: "Expected identifier or destructure pattern"
+			code: 'unexpected-token',
+			message: 'Expected identifier or destructure pattern'
 		});
 	}
 
@@ -43,7 +43,7 @@ export default function read_context(
 		} else if (is_bracket_close(code)) {
 			if (!is_bracket_pair(bracket_stack[bracket_stack.length - 1], code)) {
 				parser.error({
-					code: "unexpected-token",
+					code: 'unexpected-token',
 					message: `Expected ${String.fromCharCode(
 						get_bracket_close(bracket_stack[bracket_stack.length - 1])
 					)}`
diff --git a/src/compiler/parse/read/script.ts b/src/compiler/parse/read/script.ts
index cb59dc6d76..68591036d8 100644
--- a/src/compiler/parse/read/script.ts
+++ b/src/compiler/parse/read/script.ts
@@ -12,7 +12,7 @@ function get_context(parser: Parser, attributes: any[], start: number): string {
 	if (context.value.length !== 1 || context.value[0].type !== 'Text') {
 		parser.error({
 			code: 'invalid-script',
-			message: `context attribute must be static`
+			message: 'context attribute must be static'
 		}, start);
 	}
 
@@ -20,8 +20,8 @@ function get_context(parser: Parser, attributes: any[], start: number): string {
 
 	if (value !== 'module') {
 		parser.error({
-			code: `invalid-script`,
-			message: `If the context attribute is supplied, its value must be "module"`
+			code: 'invalid-script',
+			message: 'If the context attribute is supplied, its value must be "module"'
 		}, context.start);
 	}
 
@@ -33,8 +33,8 @@ export default function read_script(parser: Parser, start: number, attributes: N
 	const script_end = parser.template.indexOf(script_closing_tag, script_start);
 
 	if (script_end === -1) parser.error({
-		code: `unclosed-script`,
-		message: `<script> must have a closing tag`
+		code: 'unclosed-script',
+		message: '<script> must have a closing tag'
 	});
 
 	const source = parser.template.slice(0, script_start).replace(/[^\n]/g, ' ') +
diff --git a/src/compiler/parse/read/style.ts b/src/compiler/parse/read/style.ts
index 3b9502c01c..72fd8aeca1 100644
--- a/src/compiler/parse/read/style.ts
+++ b/src/compiler/parse/read/style.ts
@@ -19,7 +19,7 @@ export default function read_style(parser: Parser, start: number, attributes: No
 	} catch (err) {
 		if (err.name === 'CssSyntaxError') {
 			parser.error({
-				code: `css-syntax-error`,
+				code: 'css-syntax-error',
 				message: err.message
 			}, err.offset);
 		} else {
@@ -40,7 +40,7 @@ export default function read_style(parser: Parser, start: number, attributes: No
 
 					if (is_ref_selector(a, b)) {
 						parser.error({
-							code: `invalid-ref-selector`,
+							code: 'invalid-ref-selector',
 							message: 'ref selectors are no longer supported'
 						}, a.loc.start.offset);
 					}
@@ -49,15 +49,15 @@ export default function read_style(parser: Parser, start: number, attributes: No
 
 			if (node.type === 'Declaration' && node.value.type === 'Value' && node.value.children.length === 0) {
 				parser.error({
-					code: `invalid-declaration`,
-					message: `Declaration cannot be empty`
+					code: 'invalid-declaration',
+					message: 'Declaration cannot be empty'
 				}, node.start);
 			}
 
 			if (node.type === 'PseudoClassSelector' && node.name === 'global' && node.children === null) {
 				parser.error({
-					code: `css-syntax-error`,
-					message: `:global() must contain a selector`
+					code: 'css-syntax-error',
+					message: ':global() must contain a selector'
 				}, node.loc.start.offset);
 			}
 
diff --git a/src/compiler/parse/state/mustache.ts b/src/compiler/parse/state/mustache.ts
index b72b77c30b..cd6572ba18 100644
--- a/src/compiler/parse/state/mustache.ts
+++ b/src/compiler/parse/state/mustache.ts
@@ -67,8 +67,8 @@ export default function mustache(parser: Parser) {
 			expected = 'key';
 		} else {
 			parser.error({
-				code: `unexpected-block-close`,
-				message: `Unexpected block closing tag`
+				code: 'unexpected-block-close',
+				message: 'Unexpected block closing tag'
 			});
 		}
 
@@ -100,7 +100,7 @@ export default function mustache(parser: Parser) {
 		if (parser.eat('if')) {
 			parser.error({
 				code: 'invalid-elseif',
-				message: `'elseif' should be 'else if'`
+				message: "'elseif' should be 'else if'"
 			});
 		}
 
@@ -111,10 +111,10 @@ export default function mustache(parser: Parser) {
 			const block = parser.current();
 			if (block.type !== 'IfBlock') {
 				parser.error({
-					code: `invalid-elseif-placement`,
+					code: 'invalid-elseif-placement',
 					message: parser.stack.some(block => block.type === 'IfBlock')
 						? `Expected to close ${to_string(block)} before seeing {:else if ...} block`
-						: `Cannot have an {:else if ...} block outside an {#if ...} block`
+						: 'Cannot have an {:else if ...} block outside an {#if ...} block'
 				});
 			}
 
@@ -149,10 +149,10 @@ export default function mustache(parser: Parser) {
 			const block = parser.current();
 			if (block.type !== 'IfBlock' && block.type !== 'EachBlock') {
 				parser.error({
-					code: `invalid-else-placement`,
+					code: 'invalid-else-placement',
 					message: parser.stack.some(block => block.type === 'IfBlock' || block.type === 'EachBlock')
 						? `Expected to close ${to_string(block)} before seeing {:else} block`
-						: `Cannot have an {:else} block outside an {#if ...} or {#each ...} block`
+						: 'Cannot have an {:else} block outside an {#if ...} or {#each ...} block'
 				});
 			}
 
@@ -175,19 +175,19 @@ export default function mustache(parser: Parser) {
 		if (is_then) {
 			if (block.type !== 'PendingBlock') {
 				parser.error({
-					code: `invalid-then-placement`,
+					code: 'invalid-then-placement',
 					message: parser.stack.some(block => block.type === 'PendingBlock')
 						? `Expected to close ${to_string(block)} before seeing {:then} block`
-						: `Cannot have an {:then} block outside an {#await ...} block`
+						: 'Cannot have an {:then} block outside an {#await ...} block'
 				});
 			}
 		} else {
 			if (block.type !== 'ThenBlock' && block.type !== 'PendingBlock') {
 				parser.error({
-					code: `invalid-catch-placement`,
+					code: 'invalid-catch-placement',
 					message: parser.stack.some(block => block.type === 'ThenBlock' || block.type === 'PendingBlock')
 						? `Expected to close ${to_string(block)} before seeing {:catch} block`
-						: `Cannot have an {:catch} block outside an {#await ...} block`
+						: 'Cannot have an {:catch} block outside an {#await ...} block'
 				});
 			}
 		}
@@ -227,8 +227,8 @@ export default function mustache(parser: Parser) {
 			type = 'KeyBlock';
 		} else {
 			parser.error({
-				code: `expected-block-type`,
-				message: `Expected if, each, await or key`
+				code: 'expected-block-type',
+				message: 'Expected if, each, await or key'
 			});
 		}
 
@@ -289,8 +289,8 @@ export default function mustache(parser: Parser) {
 				parser.allow_whitespace();
 				block.index = parser.read_identifier();
 				if (!block.index) parser.error({
-					code: `expected-name`,
-					message: `Expected name`
+					code: 'expected-name',
+					message: 'Expected name'
 				});
 
 				parser.allow_whitespace();
diff --git a/src/compiler/parse/state/tag.ts b/src/compiler/parse/state/tag.ts
index d6294d4a5c..7d7a3384be 100644
--- a/src/compiler/parse/state/tag.ts
+++ b/src/compiler/parse/state/tag.ts
@@ -124,7 +124,7 @@ export default function tag(parser: Parser) {
 	if (is_closing_tag) {
 		if (is_void(name)) {
 			parser.error({
-				code: `invalid-void-content`,
+				code: 'invalid-void-content',
 				message: `<${name}> is a void element and cannot have children, or a closing tag`
 			}, start);
 		}
@@ -138,7 +138,7 @@ export default function tag(parser: Parser) {
 					? `</${name}> attempted to close <${name}> that was already automatically closed by <${parser.last_auto_closed_tag.reason}>`
 					: `</${name}> attempted to close an element that was not open`;
 				parser.error({
-					code: `invalid-closing-tag`,
+					code: 'invalid-closing-tag',
 					message
 				}, start);
 			}
@@ -179,16 +179,16 @@ export default function tag(parser: Parser) {
 		const index = element.attributes.findIndex(attr => attr.type === 'Attribute' && attr.name === 'this');
 		if (!~index) {
 			parser.error({
-				code: `missing-component-definition`,
-				message: `<svelte:component> must have a 'this' attribute`
+				code: 'missing-component-definition',
+				message: "<svelte:component> must have a 'this' attribute"
 			}, start);
 		}
 
 		const definition = element.attributes.splice(index, 1)[0];
 		if (definition.value === true || definition.value.length !== 1 || definition.value[0].type === 'Text') {
 			parser.error({
-				code: `invalid-component-definition`,
-				message: `invalid component definition`
+				code: 'invalid-component-definition',
+				message: 'invalid component definition'
 			}, definition.start);
 		}
 
@@ -262,8 +262,8 @@ function read_tag_name(parser: Parser) {
 
 		if (!legal) {
 			parser.error({
-				code: `invalid-self-placement`,
-				message: `<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, or slots passed to components`
+				code: 'invalid-self-placement',
+				message: '<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, or slots passed to components'
 			}, start);
 		}
 
@@ -290,8 +290,8 @@ function read_tag_name(parser: Parser) {
 
 	if (!valid_tag_name.test(name)) {
 		parser.error({
-			code: `invalid-tag-name`,
-			message: `Expected valid tag name`
+			code: 'invalid-tag-name',
+			message: 'Expected valid tag name'
 		}, start);
 	}
 
@@ -304,7 +304,7 @@ function read_attribute(parser: Parser, unique_names: Set<string>) {
 	function check_unique(name: string) {
 		if (unique_names.has(name)) {
 			parser.error({
-				code: `duplicate-attribute`,
+				code: 'duplicate-attribute',
 				message: 'Attributes need to be unique'
 			}, start);
 		}
@@ -373,8 +373,8 @@ function read_attribute(parser: Parser, unique_names: Set<string>) {
 		end = parser.index;
 	} else if (parser.match_regex(/["']/)) {
 		parser.error({
-			code: `unexpected-token`,
-			message: `Expected =`
+			code: 'unexpected-token',
+			message: 'Expected ='
 		}, parser.index);
 	}
 
@@ -389,7 +389,7 @@ function read_attribute(parser: Parser, unique_names: Set<string>) {
 
 		if (type === 'Ref') {
 			parser.error({
-				code: `invalid-ref-directive`,
+				code: 'invalid-ref-directive',
 				message: `The ref directive is no longer supported — use \`bind:this={${directive_name}}\` instead`
 			}, start);
 		}
@@ -397,8 +397,8 @@ function read_attribute(parser: Parser, unique_names: Set<string>) {
 		if (value[0]) {
 			if ((value as any[]).length > 1 || value[0].type === 'Text') {
 				parser.error({
-					code: `invalid-directive-value`,
-					message: `Directive value must be a JavaScript expression enclosed in curly braces`
+					code: 'invalid-directive-value',
+					message: 'Directive value must be a JavaScript expression enclosed in curly braces'
 				}, value[0].start);
 			}
 		}
@@ -453,11 +453,11 @@ function get_directive_type(name: string): DirectiveType {
 }
 
 function read_attribute_value(parser: Parser) {
-	const quote_mark = parser.eat(`'`) ? `'` : parser.eat(`"`) ? `"` : null;
+	const quote_mark = parser.eat("'") ? "'" : parser.eat('"') ? '"' : null;
 
 	const regex = (
-		quote_mark === `'` ? /'/ :
-			quote_mark === `"` ? /"/ :
+		quote_mark === "'" ? /'/ :
+			quote_mark === '"' ? /"/ :
 				/(\/>|[\s"'=<>`])/
 	);
 
@@ -520,7 +520,7 @@ function read_sequence(parser: Parser, done: () => boolean): TemplateNode[] {
 	}
 
 	parser.error({
-		code: `unexpected-eof`,
-		message: `Unexpected end of input`
+		code: 'unexpected-eof',
+		message: 'Unexpected end of input'
 	});
 }
diff --git a/src/compiler/parse/utils/bracket.ts b/src/compiler/parse/utils/bracket.ts
index ffbb9e4952..de24cbf8ba 100644
--- a/src/compiler/parse/utils/bracket.ts
+++ b/src/compiler/parse/utils/bracket.ts
@@ -1,7 +1,7 @@
-const SQUARE_BRACKET_OPEN = "[".charCodeAt(0);
-const SQUARE_BRACKET_CLOSE = "]".charCodeAt(0);
-const CURLY_BRACKET_OPEN = "{".charCodeAt(0);
-const CURLY_BRACKET_CLOSE = "}".charCodeAt(0);
+const SQUARE_BRACKET_OPEN = '['.charCodeAt(0);
+const SQUARE_BRACKET_CLOSE = ']'.charCodeAt(0);
+const CURLY_BRACKET_OPEN = '{'.charCodeAt(0);
+const CURLY_BRACKET_CLOSE = '}'.charCodeAt(0);
 
 export function is_bracket_open(code) {
 	return code === SQUARE_BRACKET_OPEN || code === CURLY_BRACKET_OPEN;
diff --git a/src/compiler/preprocess/index.ts b/src/compiler/preprocess/index.ts
index 5371baf4b3..1d7d74ceac 100644
--- a/src/compiler/preprocess/index.ts
+++ b/src/compiler/preprocess/index.ts
@@ -26,7 +26,7 @@ function parse_attributes(str: string) {
 		if (p === -1) {
 			attrs[attr] = true;
 		} else {
-			attrs[attr.slice(0, p)] = `'"`.includes(attr[p + 1]) ?
+			attrs[attr.slice(0, p)] = '\'"'.includes(attr[p + 1]) ?
 				attr.slice(p + 2, -1) :
 				attr.slice(p + 1);
 		}
diff --git a/src/runtime/internal/dev.ts b/src/runtime/internal/dev.ts
index 28daa03ae8..708b393601 100644
--- a/src/runtime/internal/dev.ts
+++ b/src/runtime/internal/dev.ts
@@ -6,17 +6,17 @@ export function dispatch_dev<T=any>(type: string, detail?: T) {
 }
 
 export function append_dev(target: Node, node: Node) {
-	dispatch_dev("SvelteDOMInsert", { target, node });
+	dispatch_dev('SvelteDOMInsert', { target, node });
 	append(target, node);
 }
 
 export function insert_dev(target: Node, node: Node, anchor?: Node) {
-	dispatch_dev("SvelteDOMInsert", { target, node, anchor });
+	dispatch_dev('SvelteDOMInsert', { target, node, anchor });
 	insert(target, node, anchor);
 }
 
 export function detach_dev(node: Node) {
-	dispatch_dev("SvelteDOMRemove", { node });
+	dispatch_dev('SvelteDOMRemove', { node });
 	detach(node);
 }
 
@@ -39,15 +39,15 @@ export function detach_after_dev(before: Node) {
 }
 
 export function listen_dev(node: Node, event: string, handler: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions | EventListenerOptions, has_prevent_default?: boolean, has_stop_propagation?: boolean) {
-	const modifiers = options === true ? [ "capture" ] : options ? Array.from(Object.keys(options)) : [];
+	const modifiers = options === true ? [ 'capture' ] : options ? Array.from(Object.keys(options)) : [];
 	if (has_prevent_default) modifiers.push('preventDefault');
 	if (has_stop_propagation) modifiers.push('stopPropagation');
 
-	dispatch_dev("SvelteDOMAddEventListener", { node, event, handler, modifiers });
+	dispatch_dev('SvelteDOMAddEventListener', { node, event, handler, modifiers });
 
 	const dispose = listen(node, event, handler, options);
 	return () => {
-		dispatch_dev("SvelteDOMRemoveEventListener", { node, event, handler, modifiers });
+		dispatch_dev('SvelteDOMRemoveEventListener', { node, event, handler, modifiers });
 		dispose();
 	};
 }
@@ -55,27 +55,27 @@ export function listen_dev(node: Node, event: string, handler: EventListenerOrEv
 export function attr_dev(node: Element, attribute: string, value?: string) {
 	attr(node, attribute, value);
 
-	if (value == null) dispatch_dev("SvelteDOMRemoveAttribute", { node, attribute });
-	else dispatch_dev("SvelteDOMSetAttribute", { node, attribute, value });
+	if (value == null) dispatch_dev('SvelteDOMRemoveAttribute', { node, attribute });
+	else dispatch_dev('SvelteDOMSetAttribute', { node, attribute, value });
 }
 
 export function prop_dev(node: Element, property: string, value?: any) {
 	node[property] = value;
 
-	dispatch_dev("SvelteDOMSetProperty", { node, property, value });
+	dispatch_dev('SvelteDOMSetProperty', { node, property, value });
 }
 
 export function dataset_dev(node: HTMLElement, property: string, value?: any) {
 	node.dataset[property] = value;
 
-	dispatch_dev("SvelteDOMSetDataset", { node, property, value });
+	dispatch_dev('SvelteDOMSetDataset', { node, property, value });
 }
 
 export function set_data_dev(text, data) {
 	data = '' + data;
 	if (text.wholeText === data) return;
 
-	dispatch_dev("SvelteDOMSetData", { node: text, data });
+	dispatch_dev('SvelteDOMSetData', { node: text, data });
 	text.data = data;
 }
 
@@ -115,7 +115,7 @@ export class SvelteComponentDev extends SvelteComponent {
 		$$inline?: boolean;
     }) {
 		if (!options || (!options.target && !options.$$inline)) {
-			throw new Error(`'target' is a required option`);
+			throw new Error("'target' is a required option");
 		}
 
 		super();
@@ -124,7 +124,7 @@ export class SvelteComponentDev extends SvelteComponent {
 	$destroy() {
 		super.$destroy();
 		this.$destroy = () => {
-			console.warn(`Component was already destroyed`); // eslint-disable-line no-console
+			console.warn('Component was already destroyed'); // eslint-disable-line no-console
 		};
 	}
 
@@ -137,7 +137,7 @@ export function loop_guard(timeout) {
 	const start = Date.now();
 	return () => {
 		if (Date.now() - start > timeout) {
-			throw new Error(`Infinite loop detected`);
+			throw new Error('Infinite loop detected');
 		}
 	};
 }
diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
index cc1996abdf..5380443fbc 100644
--- a/src/runtime/internal/dom.ts
+++ b/src/runtime/internal/dom.ts
@@ -1,4 +1,4 @@
-import { has_prop } from "./utils";
+import { has_prop } from './utils';
 
 export function append(target: Node, node: Node) {
 	target.appendChild(node);
@@ -269,7 +269,7 @@ export function add_resize_listener(node: HTMLElement, fn: () => void) {
 
 	const iframe = element('iframe');
 	iframe.setAttribute('style',
-		`display: block; position: absolute; top: 0; left: 0; width: 100%; height: 100%; ` +
+		'display: block; position: absolute; top: 0; left: 0; width: 100%; height: 100%; ' +
 		`overflow: hidden; border: 0; opacity: 0; pointer-events: none; z-index: ${z_index};`
 	);
 	iframe.setAttribute('aria-hidden', 'true');
@@ -280,7 +280,7 @@ export function add_resize_listener(node: HTMLElement, fn: () => void) {
 	let unsubscribe: () => void;
 
 	if (crossorigin) {
-		iframe.src = `data:text/html,<script>onresize=function(){parent.postMessage(0,'*')}</script>`;
+		iframe.src = "data:text/html,<script>onresize=function(){parent.postMessage(0,'*')}</script>";
 		unsubscribe = listen(window, 'message', (event: MessageEvent) => {
 			if (event.source === iframe.contentWindow) fn();
 		});
diff --git a/src/runtime/internal/keyed_each.ts b/src/runtime/internal/keyed_each.ts
index b397335c87..6e333da1a4 100644
--- a/src/runtime/internal/keyed_each.ts
+++ b/src/runtime/internal/keyed_each.ts
@@ -113,7 +113,7 @@ export function validate_each_keys(ctx, list, get_context, get_key) {
 	for (let i = 0; i < list.length; i++) {
 		const key = get_key(get_context(ctx, list, i));
 		if (keys.has(key)) {
-			throw new Error(`Cannot have duplicate keys in a keyed each`);
+			throw new Error('Cannot have duplicate keys in a keyed each');
 		}
 		keys.add(key);
 	}
diff --git a/src/runtime/internal/lifecycle.ts b/src/runtime/internal/lifecycle.ts
index 304e8d6a68..9e65e59cbd 100644
--- a/src/runtime/internal/lifecycle.ts
+++ b/src/runtime/internal/lifecycle.ts
@@ -7,7 +7,7 @@ export function set_current_component(component) {
 }
 
 export function get_current_component() {
-	if (!current_component) throw new Error(`Function called outside component initialization`);
+	if (!current_component) throw new Error('Function called outside component initialization');
 	return current_component;
 }
 
diff --git a/src/runtime/internal/ssr.ts b/src/runtime/internal/ssr.ts
index 646a81d817..6f1cdedd8a 100644
--- a/src/runtime/internal/ssr.ts
+++ b/src/runtime/internal/ssr.ts
@@ -21,9 +21,9 @@ export function spread(args, classes_to_add) {
 		if (invalid_attribute_name_character.test(name)) return;
 
 		const value = attributes[name];
-		if (value === true) str += " " + name;
+		if (value === true) str += ' ' + name;
 		else if (boolean_attributes.has(name.toLowerCase())) {
-			if (value) str += " " + name;
+			if (value) str += ' ' + name;
 		} else if (value != null) {
 			str += ` ${name}="${String(value).replace(/"/g, '&#34;').replace(/'/g, '&#39;')}"`;
 		}
@@ -133,5 +133,5 @@ export function add_attribute(name, value, boolean) {
 }
 
 export function add_classes(classes) {
-	return classes ? ` class="${classes}"` : ``;
+	return classes ? ` class="${classes}"` : '';
 }
\ No newline at end of file
diff --git a/src/runtime/internal/style_manager.ts b/src/runtime/internal/style_manager.ts
index 31d7573a76..8060e65a5d 100644
--- a/src/runtime/internal/style_manager.ts
+++ b/src/runtime/internal/style_manager.ts
@@ -40,7 +40,7 @@ export function create_rule(node: Element & ElementCSSInlineStyle, a: number, b:
 	}
 
 	const animation = node.style.animation || '';
-	node.style.animation = `${animation ? `${animation}, ` : ``}${name} ${duration}ms linear ${delay}ms 1 both`;
+	node.style.animation = `${animation ? `${animation}, ` : ''}${name} ${duration}ms linear ${delay}ms 1 both`;
 
 	active += 1;
 	return name;
diff --git a/src/runtime/internal/transitions.ts b/src/runtime/internal/transitions.ts
index 7377802232..343a8c82e4 100644
--- a/src/runtime/internal/transitions.ts
+++ b/src/runtime/internal/transitions.ts
@@ -1,5 +1,5 @@
 import { identity as linear, is_function, noop, run_all } from './utils';
-import { now } from "./environment";
+import { now } from './environment';
 import { loop } from './loop';
 import { create_rule, delete_rule } from './style_manager';
 import { custom_event } from './dom';
diff --git a/src/runtime/internal/utils.ts b/src/runtime/internal/utils.ts
index 828cb97c27..b31832c35f 100644
--- a/src/runtime/internal/utils.ts
+++ b/src/runtime/internal/utils.ts
@@ -1,4 +1,4 @@
-import { Readable } from "svelte/store";
+import { Readable } from 'svelte/store';
 
 export function noop() {}
 
diff --git a/src/runtime/transition/index.ts b/src/runtime/transition/index.ts
index f1197c0b17..7e879cb941 100644
--- a/src/runtime/transition/index.ts
+++ b/src/runtime/transition/index.ts
@@ -120,7 +120,7 @@ export function slide(node: Element, {
 		duration,
 		easing,
 		css: t =>
-			`overflow: hidden;` +
+			'overflow: hidden;' +
 			`opacity: ${Math.min(t * 20, 1) * opacity};` +
 			`height: ${t * height}px;` +
 			`padding-top: ${t * padding_top}px;` +
diff --git a/test/css/samples/empty-class/_config.js b/test/css/samples/empty-class/_config.js
index 064de4a564..725d805d65 100644
--- a/test/css/samples/empty-class/_config.js
+++ b/test/css/samples/empty-class/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [{
-		filename: "SvelteComponent.svelte",
-		code: `css-unused-selector`,
+		filename: 'SvelteComponent.svelte',
+		code: 'css-unused-selector',
 		message: 'Unused CSS selector ".x"',
 		start: {
 			line: 4,
diff --git a/test/css/samples/general-siblings-combinator-await/_config.js b/test/css/samples/general-siblings-combinator-await/_config.js
index b4ebe41828..5892e32972 100644
--- a/test/css/samples/general-siblings-combinator-await/_config.js
+++ b/test/css/samples/general-siblings-combinator-await/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				13:
 				14:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 276, column: 8, line: 15 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				14:   /* no match */
 				15:   .b ~ .c { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 303, column: 8, line: 16 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				15:   .b ~ .c { color: green; }
 				16:   .c ~ .d { color: green; }
diff --git a/test/css/samples/general-siblings-combinator-each-else-nested/_config.js b/test/css/samples/general-siblings-combinator-each-else-nested/_config.js
index cf241d856d..cd5cb14a66 100644
--- a/test/css/samples/general-siblings-combinator-each-else-nested/_config.js
+++ b/test/css/samples/general-siblings-combinator-each-else-nested/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				33:
 				34:   /* no match */
diff --git a/test/css/samples/general-siblings-combinator-each-else/_config.js b/test/css/samples/general-siblings-combinator-each-else/_config.js
index 4d9beceeb2..410a4d0ac7 100644
--- a/test/css/samples/general-siblings-combinator-each-else/_config.js
+++ b/test/css/samples/general-siblings-combinator-each-else/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				11:
 				12:   /* no match */
diff --git a/test/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js b/test/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js
index 0b5d391f50..a4c915f421 100644
--- a/test/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js
+++ b/test/css/samples/general-siblings-combinator-if-not-exhaustive-with-each/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				16:
 				17:   /* no match */
diff --git a/test/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js b/test/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js
index 81fb595d68..2f3067b262 100644
--- a/test/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js
+++ b/test/css/samples/general-siblings-combinator-if-not-exhaustive/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				12:
 				13:   /* no match */
diff --git a/test/css/samples/general-siblings-combinator-if/_config.js b/test/css/samples/general-siblings-combinator-if/_config.js
index cbc3d8a784..c2eb0503cd 100644
--- a/test/css/samples/general-siblings-combinator-if/_config.js
+++ b/test/css/samples/general-siblings-combinator-if/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				14:
 				15:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 276, column: 8, line: 16 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				15:   /* no match */
 				16:   .b ~ .c { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 303, column: 8, line: 17 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				16:   .b ~ .c { color: green; }
 				17:   .b ~ .d { color: green; }
diff --git a/test/css/samples/general-siblings-combinator-slot/_config.js b/test/css/samples/general-siblings-combinator-slot/_config.js
index 4cf743c0a0..5d8747d4f1 100644
--- a/test/css/samples/general-siblings-combinator-slot/_config.js
+++ b/test/css/samples/general-siblings-combinator-slot/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				 8:
 				 9:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 118, column: 8, line: 10 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				 9:   /* no match */
 				10:   .a ~ .b { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 145, column: 8, line: 11 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				10:   .a ~ .b { color: green; }
 				11:   .b ~ .c { color: green; }
@@ -43,7 +43,7 @@ export default {
 			end: { character: 172, column: 8, line: 12 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				11:   .b ~ .c { color: green; }
 				12:   .c ~ .f { color: green; }
@@ -57,7 +57,7 @@ export default {
 			end: { character: 199, column: 8, line: 13 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				12:   .c ~ .f { color: green; }
 				13:   .f ~ .g { color: green; }
@@ -71,7 +71,7 @@ export default {
 			end: { character: 226, column: 8, line: 14 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				13:   .f ~ .g { color: green; }
 				14:   .b ~ .f { color: green; }
diff --git a/test/css/samples/general-siblings-combinator-star/_config.js b/test/css/samples/general-siblings-combinator-star/_config.js
index 64e5baad19..0079310544 100644
--- a/test/css/samples/general-siblings-combinator-star/_config.js
+++ b/test/css/samples/general-siblings-combinator-star/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				3:     margin-left: 4px;
 				4:   }
diff --git a/test/css/samples/general-siblings-combinator/_config.js b/test/css/samples/general-siblings-combinator/_config.js
index 6513366549..662c01ae6c 100644
--- a/test/css/samples/general-siblings-combinator/_config.js
+++ b/test/css/samples/general-siblings-combinator/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				10:
 				11:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 288, column: 14, line: 12 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				11:   /* no match */
 				12:   article ~ div { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 322, column: 15, line: 13 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				12:   article ~ div { color: green; }
 				13:   span ~ article { color: green; }
@@ -43,7 +43,7 @@ export default {
 			end: { character: 353, column: 12, line: 14 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				13:   span ~ article { color: green; }
 				14:   b ~ article { color: green; }
diff --git a/test/css/samples/omit-scoping-attribute-descendant/_config.js b/test/css/samples/omit-scoping-attribute-descendant/_config.js
index 25e2a28ebb..b69a9041a5 100644
--- a/test/css/samples/omit-scoping-attribute-descendant/_config.js
+++ b/test/css/samples/omit-scoping-attribute-descendant/_config.js
@@ -1,6 +1,6 @@
 export default {
 	warnings: [{
-		code: `css-unused-selector`,
+		code: 'css-unused-selector',
 		message: 'Unused CSS selector "div > p"',
 		start: {
 			line: 8,
diff --git a/test/css/samples/siblings-combinator-await/_config.js b/test/css/samples/siblings-combinator-await/_config.js
index 5af12d38e5..b51eb7a83e 100644
--- a/test/css/samples/siblings-combinator-await/_config.js
+++ b/test/css/samples/siblings-combinator-await/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				12:
 				13:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 249, column: 8, line: 14 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				13:   /* no match */
 				14:   .a + .e { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 276, column: 8, line: 15 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				14:   .a + .e { color: green; }
 				15:   .b + .c { color: green; }
@@ -43,7 +43,7 @@ export default {
 			end: { character: 303, column: 8, line: 16 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				15:   .b + .c { color: green; }
 				16:   .c + .d { color: green; }
diff --git a/test/css/samples/siblings-combinator-each-2/_config.js b/test/css/samples/siblings-combinator-each-2/_config.js
index e4799f1055..644fe6a0ee 100644
--- a/test/css/samples/siblings-combinator-each-2/_config.js
+++ b/test/css/samples/siblings-combinator-each-2/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-		  code: "css-unused-selector",
+		  code: 'css-unused-selector',
 			frame: `
 				24:   }
 				25:   /* not match */
diff --git a/test/css/samples/siblings-combinator-each-else-nested/_config.js b/test/css/samples/siblings-combinator-each-else-nested/_config.js
index ab3fac6abe..be47c1f049 100644
--- a/test/css/samples/siblings-combinator-each-else-nested/_config.js
+++ b/test/css/samples/siblings-combinator-each-else-nested/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				21:
 				22:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 486, column: 8, line: 23 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				22:   /* no match */
 				23:   .a + .c { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 513, column: 8, line: 24 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				23:   .a + .c { color: green; }
 				24:   .a + .g { color: green; }
@@ -43,7 +43,7 @@ export default {
 			end: { character: 540, column: 8, line: 25 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				24:   .a + .g { color: green; }
 				25:   .b + .e { color: green; }
@@ -57,7 +57,7 @@ export default {
 			end: { character: 567, column: 8, line: 26 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				25:   .b + .e { color: green; }
 				26:   .c + .g { color: green; }
@@ -71,7 +71,7 @@ export default {
 			end: { character: 594, column: 8, line: 27 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				26:   .c + .g { color: green; }
 				27:   .c + .k { color: green; }
@@ -85,7 +85,7 @@ export default {
 			end: { character: 621, column: 8, line: 28 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				27:   .c + .k { color: green; }
 				28:   .d + .d { color: green; }
@@ -99,7 +99,7 @@ export default {
 			end: { character: 648, column: 8, line: 29 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				28:   .d + .d { color: green; }
 				29:   .e + .f { color: green; }
@@ -113,7 +113,7 @@ export default {
 			end: { character: 675, column: 8, line: 30 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				29:   .e + .f { color: green; }
 				30:   .f + .f { color: green; }
@@ -127,7 +127,7 @@ export default {
 			end: { character: 702, column: 8, line: 31 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				30:   .f + .f { color: green; }
 				31:   .g + .j { color: green; }
diff --git a/test/css/samples/siblings-combinator-each-else/_config.js b/test/css/samples/siblings-combinator-each-else/_config.js
index fcd961d5fe..89cbd9ef1a 100644
--- a/test/css/samples/siblings-combinator-each-else/_config.js
+++ b/test/css/samples/siblings-combinator-each-else/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				10:
 				11:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 179, column: 8, line: 12 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				11:   /* no match */
 				12:   .a + .d { color: green; }
diff --git a/test/css/samples/siblings-combinator-each-nested/_config.js b/test/css/samples/siblings-combinator-each-nested/_config.js
index ce9c46fb06..6d58e6a4ec 100644
--- a/test/css/samples/siblings-combinator-each-nested/_config.js
+++ b/test/css/samples/siblings-combinator-each-nested/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				56:
 				57:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 1236, column: 8, line: 58 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				57:   /* no match */
 				58:   .a + .h { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 1263, column: 8, line: 59 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				58:   .a + .h { color: green; }
 				59:   .a + .i { color: green; }
@@ -43,7 +43,7 @@ export default {
 			end: { character: 1290, column: 8, line: 60 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				59:   .a + .i { color: green; }
 				60:   .c + .h { color: green; }
@@ -57,7 +57,7 @@ export default {
 			end: { character: 1317, column: 8, line: 61 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				60:   .c + .h { color: green; }
 				61:   .c + .i { color: green; }
@@ -71,7 +71,7 @@ export default {
 			end: { character: 1344, column: 8, line: 62 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				61:   .c + .i { color: green; }
 				62:   .d + .f { color: green; }
@@ -85,7 +85,7 @@ export default {
 			end: { character: 1371, column: 8, line: 63 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				62:   .d + .f { color: green; }
 				63:   .d + .g { color: green; }
@@ -99,7 +99,7 @@ export default {
 			end: { character: 1398, column: 8, line: 64 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				63:   .d + .g { color: green; }
 				64:   .e + .g { color: green; }
diff --git a/test/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js b/test/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js
index 0155bf0cf1..6648dec55d 100644
--- a/test/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js
+++ b/test/css/samples/siblings-combinator-if-not-exhaustive-with-each/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				16:
 				17:   /* no match */
diff --git a/test/css/samples/siblings-combinator-if-not-exhaustive/_config.js b/test/css/samples/siblings-combinator-if-not-exhaustive/_config.js
index e01c358eff..51ca551055 100644
--- a/test/css/samples/siblings-combinator-if-not-exhaustive/_config.js
+++ b/test/css/samples/siblings-combinator-if-not-exhaustive/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				12:
 				13:   /* no match */
diff --git a/test/css/samples/siblings-combinator-if/_config.js b/test/css/samples/siblings-combinator-if/_config.js
index c2396f08ef..bc8e32f5fd 100644
--- a/test/css/samples/siblings-combinator-if/_config.js
+++ b/test/css/samples/siblings-combinator-if/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				13:
 				14:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 249, column: 8, line: 15 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				14:   /* no match */
 				15:   .a + .e { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 276, column: 8, line: 16 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				15:   .a + .e { color: green; }
 				16:   .b + .c { color: green; }
@@ -43,7 +43,7 @@ export default {
 			end: { character: 303, column: 8, line: 17 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				16:   .b + .c { color: green; }
 				17:   .b + .d { color: green; }
diff --git a/test/css/samples/siblings-combinator-slot/_config.js b/test/css/samples/siblings-combinator-slot/_config.js
index c0a00500d4..8dbb714bd3 100644
--- a/test/css/samples/siblings-combinator-slot/_config.js
+++ b/test/css/samples/siblings-combinator-slot/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				 7:
 				 8:   /* no match */
@@ -15,7 +15,7 @@ export default {
 			end: { character: 91, column: 8, line: 9 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				 8:   /* no match */
 				 9:   .a + .b { color: green; }
@@ -29,7 +29,7 @@ export default {
 			end: { character: 118, column: 8, line: 10 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				 9:   .a + .b { color: green; }
 				10:   .b + .c { color: green; }
diff --git a/test/css/samples/siblings-combinator-star/_config.js b/test/css/samples/siblings-combinator-star/_config.js
index 32ff416981..687331e41c 100644
--- a/test/css/samples/siblings-combinator-star/_config.js
+++ b/test/css/samples/siblings-combinator-star/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				3:     margin-left: 4px;
 				4:   }
diff --git a/test/css/samples/siblings-combinator/_config.js b/test/css/samples/siblings-combinator/_config.js
index 2285b5a837..b54cd28190 100644
--- a/test/css/samples/siblings-combinator/_config.js
+++ b/test/css/samples/siblings-combinator/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				3:     color: green;
 				4:   }
@@ -15,7 +15,7 @@ export default {
 			end: { character: 58, column: 14, line: 5 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			
 			frame:`
 				 6:     color: green;
@@ -30,7 +30,7 @@ export default {
 			end: { character: 95, column: 15, line: 8 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			
 			frame: `
 				 9:     color: green;
@@ -45,7 +45,7 @@ export default {
 			end: { character: 129, column: 12, line: 11 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			frame: `
 				12:     color: green;
 				13:   }
diff --git a/test/css/samples/unused-selector-child-combinator/_config.js b/test/css/samples/unused-selector-child-combinator/_config.js
index becf382147..603e0d1fd0 100644
--- a/test/css/samples/unused-selector-child-combinator/_config.js
+++ b/test/css/samples/unused-selector-child-combinator/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			message: 'Unused CSS selector "article > *"',
 			frame: `
 			1: <style>
@@ -14,7 +14,7 @@ export default {
 			end: { character: 21, column: 12, line: 2 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			message: 'Unused CSS selector "article *"',
 			frame: `
 			4:   }
@@ -28,7 +28,7 @@ export default {
 			end: { character: 58, column: 10, line: 6 }
 		},
 		{
-			code: "css-unused-selector",
+			code: 'css-unused-selector',
 			message: 'Unused CSS selector ".article > *"',
 			frame: `
 			 8:   }
diff --git a/test/css/samples/unused-selector-leading/_config.js b/test/css/samples/unused-selector-leading/_config.js
index 2516567f59..487e704c92 100644
--- a/test/css/samples/unused-selector-leading/_config.js
+++ b/test/css/samples/unused-selector-leading/_config.js
@@ -1,8 +1,8 @@
 export default {
 	warnings: [
 		{
-			filename: "SvelteComponent.svelte",
-			code: `css-unused-selector`,
+			filename: 'SvelteComponent.svelte',
+			code: 'css-unused-selector',
 			message: 'Unused CSS selector ".foo"',
 			start: {
 				line: 4,
@@ -25,8 +25,8 @@ export default {
 		},
 
 		{
-			filename: "SvelteComponent.svelte",
-			code: `css-unused-selector`,
+			filename: 'SvelteComponent.svelte',
+			code: 'css-unused-selector',
 			message: 'Unused CSS selector ".baz"',
 			start: {
 				line: 4,
diff --git a/test/css/samples/unused-selector-ternary/_config.js b/test/css/samples/unused-selector-ternary/_config.js
index 4eb12f3fe2..95b09ab891 100644
--- a/test/css/samples/unused-selector-ternary/_config.js
+++ b/test/css/samples/unused-selector-ternary/_config.js
@@ -4,8 +4,8 @@ export default {
 	},
 
 	warnings: [{
-		filename: "SvelteComponent.svelte",
-		code: `css-unused-selector`,
+		filename: 'SvelteComponent.svelte',
+		code: 'css-unused-selector',
 		message: 'Unused CSS selector ".maybeactive"',
 		start: {
 			line: 16,
diff --git a/test/css/samples/unused-selector/_config.js b/test/css/samples/unused-selector/_config.js
index 790eb9e875..b3acb2c78e 100644
--- a/test/css/samples/unused-selector/_config.js
+++ b/test/css/samples/unused-selector/_config.js
@@ -1,7 +1,7 @@
 export default {
 	warnings: [{
-		filename: "SvelteComponent.svelte",
-		code: `css-unused-selector`,
+		filename: 'SvelteComponent.svelte',
+		code: 'css-unused-selector',
 		message: 'Unused CSS selector ".bar"',
 		start: {
 			line: 8,
diff --git a/test/custom-elements/index.ts b/test/custom-elements/index.ts
index 25cef932d8..d3644a3142 100644
--- a/test/custom-elements/index.ts
+++ b/test/custom-elements/index.ts
@@ -4,7 +4,7 @@ import * as http from 'http';
 import { rollup } from 'rollup';
 import virtual from '@rollup/plugin-virtual';
 import puppeteer from 'puppeteer';
-import { addLineNumbers, loadConfig, loadSvelte } from "../helpers";
+import { addLineNumbers, loadConfig, loadSvelte } from '../helpers';
 import { deepEqual } from 'assert';
 
 const page = `
@@ -87,7 +87,7 @@ describe('custom-elements', function() {
 
 						transform(code, id) {
 							if (id.endsWith('.svelte')) {
-								const compiled = svelte.compile(code.replace(/\r/g, ""), {
+								const compiled = svelte.compile(code.replace(/\r/g, ''), {
 									customElement: true,
 									dev: config.dev
 								});
diff --git a/test/custom-elements/samples/extended-builtin/_config.js b/test/custom-elements/samples/extended-builtin/_config.js
index cbd57acc65..932460335f 100644
--- a/test/custom-elements/samples/extended-builtin/_config.js
+++ b/test/custom-elements/samples/extended-builtin/_config.js
@@ -1,6 +1,6 @@
 export default {
 	warnings: [{
-		code: "avoid-is",
+		code: 'avoid-is',
 		message: "The 'is' attribute is not supported cross-browser and should be avoided",
 		pos: 98,
 		start: {
diff --git a/test/custom-elements/samples/nested.skip/test.js b/test/custom-elements/samples/nested.skip/test.js
index 85320297ea..0052e19ad0 100644
--- a/test/custom-elements/samples/nested.skip/test.js
+++ b/test/custom-elements/samples/nested.skip/test.js
@@ -8,10 +8,10 @@ export default async function (target) {
 	const button = counter.shadowRoot.querySelector('button');
 
 	assert.equal(counter.count, 0);
-	assert.equal(counter.shadowRoot.innerHTML, `<button>count: 0</button>`);
+	assert.equal(counter.shadowRoot.innerHTML, '<button>count: 0</button>');
 
 	await button.dispatchEvent(new MouseEvent('click'));
 
 	assert.equal(counter.count, 1);
-	assert.equal(counter.shadowRoot.innerHTML, `<button>count: 1</button>`);
+	assert.equal(counter.shadowRoot.innerHTML, '<button>count: 1</button>');
 }
\ No newline at end of file
diff --git a/test/custom-elements/samples/no-missing-prop-warnings/test.js b/test/custom-elements/samples/no-missing-prop-warnings/test.js
index 1909e7aef9..c3296afde0 100644
--- a/test/custom-elements/samples/no-missing-prop-warnings/test.js
+++ b/test/custom-elements/samples/no-missing-prop-warnings/test.js
@@ -12,7 +12,7 @@ export default function (target) {
 	target.innerHTML = '<my-app foo=yes />';
 
 	assert.deepEqual(warnings, [
-		`<my-app> was created without expected prop 'bar'`
+		"<my-app> was created without expected prop 'bar'"
 	]);
 
 	console.warn = warn;
diff --git a/test/custom-elements/samples/no-svelte-options/_config.js b/test/custom-elements/samples/no-svelte-options/_config.js
index e45582a127..98273f767f 100644
--- a/test/custom-elements/samples/no-svelte-options/_config.js
+++ b/test/custom-elements/samples/no-svelte-options/_config.js
@@ -1,6 +1,6 @@
 export default {
 	warnings: [{
-		code: "custom-element-no-tag",
+		code: 'custom-element-no-tag',
 		message: "No custom element 'tag' option was specified. To automatically register a custom element, specify a name with a hyphen in it, e.g. <svelte:options tag=\"my-thing\"/>. To hide this warning, use <svelte:options tag={null}/>",
 		pos: 0,
 		start: {
diff --git a/test/custom-elements/samples/no-svelte-options/test.js b/test/custom-elements/samples/no-svelte-options/test.js
index c77f035088..e6ce82d1a4 100644
--- a/test/custom-elements/samples/no-svelte-options/test.js
+++ b/test/custom-elements/samples/no-svelte-options/test.js
@@ -3,7 +3,7 @@ import CustomElement from './main.svelte';
 
 export default function (target) {
 	customElements.define('no-tag', CustomElement);
-	target.innerHTML = `<no-tag name="world"></no-tag>`;
+	target.innerHTML = '<no-tag name="world"></no-tag>';
 
 	const el = target.querySelector('no-tag');
 	const h1 = el.shadowRoot.querySelector('h1');
diff --git a/test/custom-elements/samples/no-tag-warning/_config.js b/test/custom-elements/samples/no-tag-warning/_config.js
index 7cdfdbaec6..fb476a7b5b 100644
--- a/test/custom-elements/samples/no-tag-warning/_config.js
+++ b/test/custom-elements/samples/no-tag-warning/_config.js
@@ -1,6 +1,6 @@
 export default {
 	warnings: [{
-		code: "custom-element-no-tag",
+		code: 'custom-element-no-tag',
 		message: "No custom element 'tag' option was specified. To automatically register a custom element, specify a name with a hyphen in it, e.g. <svelte:options tag=\"my-thing\"/>. To hide this warning, use <svelte:options tag={null}/>",
 		pos: 0,
 		start: {
diff --git a/test/custom-elements/samples/no-tag-warning/test.js b/test/custom-elements/samples/no-tag-warning/test.js
index c77f035088..e6ce82d1a4 100644
--- a/test/custom-elements/samples/no-tag-warning/test.js
+++ b/test/custom-elements/samples/no-tag-warning/test.js
@@ -3,7 +3,7 @@ import CustomElement from './main.svelte';
 
 export default function (target) {
 	customElements.define('no-tag', CustomElement);
-	target.innerHTML = `<no-tag name="world"></no-tag>`;
+	target.innerHTML = '<no-tag name="world"></no-tag>';
 
 	const el = target.querySelector('no-tag');
 	const h1 = el.shadowRoot.querySelector('h1');
diff --git a/test/custom-elements/samples/no-tag/test.js b/test/custom-elements/samples/no-tag/test.js
index c77f035088..e6ce82d1a4 100644
--- a/test/custom-elements/samples/no-tag/test.js
+++ b/test/custom-elements/samples/no-tag/test.js
@@ -3,7 +3,7 @@ import CustomElement from './main.svelte';
 
 export default function (target) {
 	customElements.define('no-tag', CustomElement);
-	target.innerHTML = `<no-tag name="world"></no-tag>`;
+	target.innerHTML = '<no-tag name="world"></no-tag>';
 
 	const el = target.querySelector('no-tag');
 	const h1 = el.shadowRoot.querySelector('h1');
diff --git a/test/hydration/samples/if-block-update/_config.js b/test/hydration/samples/if-block-update/_config.js
index 75d056e04d..260ae62d53 100644
--- a/test/hydration/samples/if-block-update/_config.js
+++ b/test/hydration/samples/if-block-update/_config.js
@@ -19,6 +19,6 @@ export default {
 
 		component.foo = false;
 		component.bar = true;
-		assert.htmlEqual(target.innerHTML, `<p>bar!</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>bar!</p>');
 	}
 };
\ No newline at end of file
diff --git a/test/hydration/samples/raw/_config.js b/test/hydration/samples/raw/_config.js
index 4af36b099e..a43f634906 100644
--- a/test/hydration/samples/raw/_config.js
+++ b/test/hydration/samples/raw/_config.js
@@ -2,7 +2,7 @@ export default {
 	skip: true, // existing nodes are blown away
 
 	props: {
-		raw: `<p>this is some html</p> <p>and so is this</p>`
+		raw: '<p>this is some html</p> <p>and so is this</p>'
 	},
 
 	snapshot(target) {
diff --git a/test/js/index.ts b/test/js/index.ts
index 3a3643de47..b94c9c01d6 100644
--- a/test/js/index.ts
+++ b/test/js/index.ts
@@ -1,18 +1,18 @@
-import * as assert from "assert";
-import * as fs from "fs";
-import * as path from "path";
-import * as colors from "kleur";
-import { loadConfig, svelte, shouldUpdateExpected } from "../helpers";
+import * as assert from 'assert';
+import * as fs from 'fs';
+import * as path from 'path';
+import * as colors from 'kleur';
+import { loadConfig, svelte, shouldUpdateExpected } from '../helpers';
 
-describe("js", () => {
+describe('js', () => {
 	fs.readdirSync(`${__dirname}/samples`).forEach(dir => {
-		if (dir[0] === ".") return;
+		if (dir[0] === '.') return;
 
 		// add .solo to a sample directory name to only run that test
 		const solo = /\.solo/.test(dir);
 
 		if (solo && process.env.CI) {
-			throw new Error("Forgot to remove `solo: true` from test");
+			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
 		const resolved = path.resolve(`${__dirname}/samples`, dir);
@@ -25,7 +25,7 @@ describe("js", () => {
 		(solo ? it.only : it)(dir, () => {
 			const config = loadConfig(`${resolved}/_config.js`);
 
-			const input = fs.readFileSync(`${resolved}/input.svelte`, "utf-8").replace(/\s+$/, "").replace(/\r/g, "");
+			const input = fs.readFileSync(`${resolved}/input.svelte`, 'utf-8').replace(/\s+$/, '').replace(/\r/g, '');
 
 			let actual;
 
@@ -45,7 +45,7 @@ describe("js", () => {
 
 			let expected = '';
 			try {
-				expected = fs.readFileSync(expectedPath, "utf-8");
+				expected = fs.readFileSync(expectedPath, 'utf-8');
 			} catch (error) {
 				console.log(error);
 				if (error.code === 'ENOENT') {
@@ -56,8 +56,8 @@ describe("js", () => {
 
 			try {
 				assert.equal(
-					actual.trim().replace(/^[ \t]+$/gm, "").replace(/\r/g, ""),
-					expected.trim().replace(/^[ \t]+$/gm, "").replace(/\r/g, "")
+					actual.trim().replace(/^[ \t]+$/gm, '').replace(/\r/g, ''),
+					expected.trim().replace(/^[ \t]+$/gm, '').replace(/\r/g, '')
 				);
 			} catch (error) {
 				if (shouldUpdateExpected()) {
diff --git a/test/js/update.js b/test/js/update.js
index fa9c834182..3e968f0e4c 100644
--- a/test/js/update.js
+++ b/test/js/update.js
@@ -1,13 +1,13 @@
 // this file will replace all the expected.js files with their _actual
 // equivalents. Only use it when you're sure that you haven't
 // broken anything!
-const fs = require("fs");
-const glob = require("tiny-glob/sync.js");
+const fs = require('fs');
+const glob = require('tiny-glob/sync.js');
 
-glob("samples/*/_actual.js", { cwd: __dirname }).forEach(file => {
-	const actual = fs.readFileSync(`${__dirname}/${file}`, "utf-8");
+glob('samples/*/_actual.js', { cwd: __dirname }).forEach(file => {
+	const actual = fs.readFileSync(`${__dirname}/${file}`, 'utf-8');
 	fs.writeFileSync(
-		`${__dirname}/${file.replace("_actual.js", "expected.js")}`,
+		`${__dirname}/${file.replace('_actual.js', 'expected.js')}`,
 		actual
 	);
 });
diff --git a/test/parser/index.ts b/test/parser/index.ts
index 32afcbbafc..384f6a2681 100644
--- a/test/parser/index.ts
+++ b/test/parser/index.ts
@@ -20,7 +20,7 @@ describe('parse', () => {
 		(skip ? it.skip : solo ? it.only : it)(dir, () => {
 			const options = tryToLoadJson(`${__dirname}/samples/${dir}/options.json`) || {};
 
-			const input = fs.readFileSync(`${__dirname}/samples/${dir}/input.svelte`, 'utf-8').replace(/\s+$/, '').replace(/\r/g, "");
+			const input = fs.readFileSync(`${__dirname}/samples/${dir}/input.svelte`, 'utf-8').replace(/\s+$/, '').replace(/\r/g, '');
 			const expectedOutput = tryToLoadJson(`${__dirname}/samples/${dir}/output.json`);
 			const expectedError = tryToLoadJson(`${__dirname}/samples/${dir}/error.json`);
 
diff --git a/test/parser/update.ts b/test/parser/update.ts
index 0edac895b5..83b8cbc865 100644
--- a/test/parser/update.ts
+++ b/test/parser/update.ts
@@ -1,13 +1,13 @@
 // this file will replace all the output.json files with their _actual.json
 // equivalents. Only use it when you're sure that you haven't
 // broken anything!
-const fs = require("fs");
-const glob = require("tiny-glob/sync.js");
+const fs = require('fs');
+const glob = require('tiny-glob/sync.js');
 
-glob("samples/*/_actual.json", { cwd: __dirname }).forEach(file => {
-	const actual = fs.readFileSync(`${__dirname}/${file}`, "utf-8");
+glob('samples/*/_actual.json', { cwd: __dirname }).forEach(file => {
+	const actual = fs.readFileSync(`${__dirname}/${file}`, 'utf-8');
 	fs.writeFileSync(
-		`${__dirname}/${file.replace("_actual.json", "output.json")}`,
+		`${__dirname}/${file.replace('_actual.json', 'output.json')}`,
 		actual
 	);
 });
diff --git a/test/preprocess/samples/script-self-closing/_config.js b/test/preprocess/samples/script-self-closing/_config.js
index 4baab9730e..ab87c7be1e 100644
--- a/test/preprocess/samples/script-self-closing/_config.js
+++ b/test/preprocess/samples/script-self-closing/_config.js
@@ -1,11 +1,11 @@
-import * as assert from "assert";
+import * as assert from 'assert';
 
 export default {
 	preprocess: {
 		script: ({ content, attributes }) => {
-			assert.equal(content, "");
+			assert.equal(content, '');
 			return {
-				code: `console.log("${attributes["the-answer"]}");`
+				code: `console.log("${attributes['the-answer']}");`
 			};
 		}
 	}
diff --git a/test/preprocess/samples/style-self-closing/_config.js b/test/preprocess/samples/style-self-closing/_config.js
index 0a05cd3d64..af762e8da8 100644
--- a/test/preprocess/samples/style-self-closing/_config.js
+++ b/test/preprocess/samples/style-self-closing/_config.js
@@ -1,9 +1,9 @@
-import * as assert from "assert";
+import * as assert from 'assert';
 
 export default {
 	preprocess: {
 		style: ({ content, attributes: { color } }) => {
-			assert.equal(content, "");
+			assert.equal(content, '');
 			return {
 				code: `div { color: ${color}; }`
 			};
diff --git a/test/runtime/index.ts b/test/runtime/index.ts
index 9e0ba6568f..153ac9dbb8 100644
--- a/test/runtime/index.ts
+++ b/test/runtime/index.ts
@@ -1,9 +1,9 @@
-import * as path from "path";
-import * as fs from "fs";
+import * as path from 'path';
+import * as fs from 'fs';
 import { rollup } from 'rollup';
 import virtual from '@rollup/plugin-virtual';
 import glob from 'tiny-glob/sync.js';
-import { clear_loops, flush, set_now, set_raf } from "../../internal";
+import { clear_loops, flush, set_now, set_raf } from '../../internal';
 
 import {
 	assert,
@@ -14,7 +14,7 @@ import {
 	env,
 	setupHtmlEqual,
 	mkdirp
-} from "../helpers";
+} from '../helpers';
 
 let svelte$;
 let svelte;
@@ -29,17 +29,17 @@ process.on('unhandledRejection', err => {
 	unhandled_rejection = err;
 });
 
-describe("runtime", () => {
+describe('runtime', () => {
 	before(() => {
 		svelte = loadSvelte(false);
 		svelte$ = loadSvelte(true);
 
-		require.extensions[".svelte"] = function(module, filename) {
+		require.extensions['.svelte'] = function(module, filename) {
 			const options = Object.assign({
 				filename
 			}, compileOptions);
 
-			const { js: { code } } = compile(fs.readFileSync(filename, "utf-8").replace(/\r/g, ""), options);
+			const { js: { code } } = compile(fs.readFileSync(filename, 'utf-8').replace(/\r/g, ''), options);
 
 			return module._compile(code, filename);
 		};
@@ -50,7 +50,7 @@ describe("runtime", () => {
 	const failed = new Set();
 
 	function runTest(dir, hydrate) {
-		if (dir[0] === ".") return;
+		if (dir[0] === '.') return;
 
 		const config = loadConfig(`${__dirname}/samples/${dir}/_config.js`);
 		const solo = config.solo || /\.solo/.test(dir);
@@ -58,7 +58,7 @@ describe("runtime", () => {
 		if (hydrate && config.skip_if_hydrate) return;
 
 		if (solo && process.env.CI) {
-			throw new Error("Forgot to remove `solo: true` from test");
+			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
 		(config.skip ? it.skip : solo ? it.only : it)(`${dir} ${hydrate ? '(with hydration)' : ''}`, () => {
@@ -103,7 +103,7 @@ describe("runtime", () => {
 
 				try {
 					const { js } = compile(
-						fs.readFileSync(`${cwd}/${file}`, 'utf-8').replace(/\r/g, ""),
+						fs.readFileSync(`${cwd}/${file}`, 'utf-8').replace(/\r/g, ''),
 						{
 							...compileOptions,
 							filename: file
@@ -151,7 +151,7 @@ describe("runtime", () => {
 					// Put things we need on window for testing
 					window.SvelteComponent = SvelteComponent;
 
-					const target = window.document.querySelector("main");
+					const target = window.document.querySelector('main');
 
 					const warnings = [];
 					const warn = console.warn;
@@ -172,14 +172,14 @@ describe("runtime", () => {
 
 					if (config.error) {
 						unintendedError = true;
-						throw new Error("Expected a runtime error");
+						throw new Error('Expected a runtime error');
 					}
 
 					if (config.warnings) {
 						assert.deepEqual(warnings, config.warnings);
 					} else if (warnings.length) {
 						unintendedError = true;
-						throw new Error("Received unexpected warnings");
+						throw new Error('Received unexpected warnings');
 					}
 
 					if (config.html) {
@@ -204,7 +204,7 @@ describe("runtime", () => {
 						});
 					} else {
 						component.$destroy();
-						assert.htmlEqual(target.innerHTML, "");
+						assert.htmlEqual(target.innerHTML, '');
 
 						if (unhandled_rejection) {
 							throw unhandled_rejection;
@@ -250,8 +250,8 @@ describe("runtime", () => {
 
 	async function create_component(src = '<div></div>') {
 		const { js } = svelte$.compile(src, {
-			format: "esm",
-			name: "SvelteComponent",
+			format: 'esm',
+			name: 'SvelteComponent',
 			dev: true
 		});
 
@@ -282,7 +282,7 @@ describe("runtime", () => {
 		);
 	}
 
-	it("fails if options.target is missing in dev mode", async () => {
+	it('fails if options.target is missing in dev mode', async () => {
 		const App = await create_component();
 
 		assert.throws(() => {
@@ -290,7 +290,7 @@ describe("runtime", () => {
 		}, /'target' is a required option/);
 	});
 
-	it("fails if options.hydrate is true but the component is non-hydratable", async () => {
+	it('fails if options.hydrate is true but the component is non-hydratable', async () => {
 		const App = await create_component();
 
 		assert.throws(() => {
diff --git a/test/runtime/samples/action-custom-event-handler-this/_config.js b/test/runtime/samples/action-custom-event-handler-this/_config.js
index 754f813c7f..ec3fa373eb 100644
--- a/test/runtime/samples/action-custom-event-handler-this/_config.js
+++ b/test/runtime/samples/action-custom-event-handler-this/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<input>`,
+	html: '<input>',
 
 	test({ assert, component, target, window }) {
 		const input = target.querySelector('input');
diff --git a/test/runtime/samples/action-this/_config.js b/test/runtime/samples/action-this/_config.js
index c59ff3b634..933ce993b9 100644
--- a/test/runtime/samples/action-this/_config.js
+++ b/test/runtime/samples/action-this/_config.js
@@ -3,9 +3,9 @@ export default {
 		const button = target.querySelector('button');
 		const click = new window.MouseEvent('click');
 
-		assert.htmlEqual(target.innerHTML, `<button>1</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>1</button>');
 		await button.dispatchEvent(click);
 		await Promise.resolve();
-		assert.htmlEqual(target.innerHTML, `<button>2</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>2</button>');
 	}
 };
diff --git a/test/runtime/samples/array-literal-spread-deopt/_config.js b/test/runtime/samples/array-literal-spread-deopt/_config.js
index d4fdcfad85..926f462b55 100644
--- a/test/runtime/samples/array-literal-spread-deopt/_config.js
+++ b/test/runtime/samples/array-literal-spread-deopt/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div>a</div> <div>b</div> <div>c</div>`
+	html: '<div>a</div> <div>b</div> <div>c</div>'
 };
diff --git a/test/runtime/samples/attribute-boolean-case-insensitive/_config.js b/test/runtime/samples/attribute-boolean-case-insensitive/_config.js
index 16e5ade6d2..99ccedb8c9 100644
--- a/test/runtime/samples/attribute-boolean-case-insensitive/_config.js
+++ b/test/runtime/samples/attribute-boolean-case-insensitive/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<input readonly>`
+	html: '<input readonly>'
 };
diff --git a/test/runtime/samples/attribute-boolean-false/_config.js b/test/runtime/samples/attribute-boolean-false/_config.js
index e47c5e7df1..935b709fab 100644
--- a/test/runtime/samples/attribute-boolean-false/_config.js
+++ b/test/runtime/samples/attribute-boolean-false/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<textarea></textarea>`,
+	html: '<textarea></textarea>',
 	test({ assert, component, target }) {
 		const textarea = target.querySelector('textarea');
 		assert.ok(textarea.readOnly === false);
diff --git a/test/runtime/samples/attribute-boolean-true/_config.js b/test/runtime/samples/attribute-boolean-true/_config.js
index 1f77e33027..ccc0814296 100644
--- a/test/runtime/samples/attribute-boolean-true/_config.js
+++ b/test/runtime/samples/attribute-boolean-true/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<textarea readonly></textarea>`,
+	html: '<textarea readonly></textarea>',
 	test({ assert, component, target }) {
 		const textarea = target.querySelector('textarea');
 		assert.ok(textarea.readOnly);
diff --git a/test/runtime/samples/attribute-boolean-with-spread/_config.js b/test/runtime/samples/attribute-boolean-with-spread/_config.js
index 270804170d..1fd2443369 100644
--- a/test/runtime/samples/attribute-boolean-with-spread/_config.js
+++ b/test/runtime/samples/attribute-boolean-with-spread/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<input>`
+	html: '<input>'
 };
diff --git a/test/runtime/samples/attribute-dynamic-quotemarks/_config.js b/test/runtime/samples/attribute-dynamic-quotemarks/_config.js
index b9f4364624..d74a0445d2 100644
--- a/test/runtime/samples/attribute-dynamic-quotemarks/_config.js
+++ b/test/runtime/samples/attribute-dynamic-quotemarks/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<span title='"foo"'>foo</span>`
+	html: '<span title=\'"foo"\'>foo</span>'
 };
diff --git a/test/runtime/samples/attribute-dynamic-shorthand/_config.js b/test/runtime/samples/attribute-dynamic-shorthand/_config.js
index 53f474db23..ebf4dd3881 100644
--- a/test/runtime/samples/attribute-dynamic-shorthand/_config.js
+++ b/test/runtime/samples/attribute-dynamic-shorthand/_config.js
@@ -1,8 +1,8 @@
 export default {
-	html: `<div id="foo"></div>`,
+	html: '<div id="foo"></div>',
 
 	test({ assert, component, target }) {
 		component.id = 'bar';
-		assert.equal( target.innerHTML, `<div id="bar"></div>` );
+		assert.equal( target.innerHTML, '<div id="bar"></div>' );
 	}
 };
diff --git a/test/runtime/samples/attribute-dynamic-type/_config.js b/test/runtime/samples/attribute-dynamic-type/_config.js
index 92f6ce196d..19aa33d65e 100644
--- a/test/runtime/samples/attribute-dynamic-type/_config.js
+++ b/test/runtime/samples/attribute-dynamic-type/_config.js
@@ -6,7 +6,7 @@ export default {
 		inputValue: 42
 	},
 
-	html: `<input type="text">`,
+	html: '<input type="text">',
 
 	test({ assert, component, target }) {
 		const input = target.querySelector('input');
diff --git a/test/runtime/samples/attribute-dynamic/_config.js b/test/runtime/samples/attribute-dynamic/_config.js
index 04f419145d..34323a997e 100644
--- a/test/runtime/samples/attribute-dynamic/_config.js
+++ b/test/runtime/samples/attribute-dynamic/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<div style="color: red;">red</div>`,
+	html: '<div style="color: red;">red</div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector( 'div' );
@@ -7,7 +7,7 @@ export default {
 		assert.equal( div.style.color, 'red' );
 
 		component.color = 'blue';
-		assert.equal( target.innerHTML, `<div style="color: blue;">blue</div>` );
+		assert.equal( target.innerHTML, '<div style="color: blue;">blue</div>' );
 		assert.equal( div.style.color, 'blue' );
 	}
 };
diff --git a/test/runtime/samples/attribute-empty/_config.js b/test/runtime/samples/attribute-empty/_config.js
index b9ce14cce1..f9aaeb39a6 100644
--- a/test/runtime/samples/attribute-empty/_config.js
+++ b/test/runtime/samples/attribute-empty/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div class=""></div>`
+	html: '<div class=""></div>'
 };
diff --git a/test/runtime/samples/attribute-false/_config.js b/test/runtime/samples/attribute-false/_config.js
index 632d4ac1c2..c05d83cb3d 100644
--- a/test/runtime/samples/attribute-false/_config.js
+++ b/test/runtime/samples/attribute-false/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div class="false"></div>`
+	html: '<div class="false"></div>'
 };
diff --git a/test/runtime/samples/attribute-null-classname-no-style/_config.js b/test/runtime/samples/attribute-null-classname-no-style/_config.js
index 4a78b680ef..6cfefc8834 100644
--- a/test/runtime/samples/attribute-null-classname-no-style/_config.js
+++ b/test/runtime/samples/attribute-null-classname-no-style/_config.js
@@ -1,9 +1,9 @@
 export default {
 	props: {
-		testName: "testClassName"
+		testName: 'testClassName'
 	},
 
-	html: `<div class="testClassName"></div>`,
+	html: '<div class="testClassName"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
diff --git a/test/runtime/samples/attribute-null-classname-with-style/_config.js b/test/runtime/samples/attribute-null-classname-with-style/_config.js
index 3ebc593b5d..d81543295e 100644
--- a/test/runtime/samples/attribute-null-classname-with-style/_config.js
+++ b/test/runtime/samples/attribute-null-classname-with-style/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<div class=" svelte-x1o6ra"></div>`,
+	html: '<div class=" svelte-x1o6ra"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
diff --git a/test/runtime/samples/attribute-null-classnames-no-style/_config.js b/test/runtime/samples/attribute-null-classnames-no-style/_config.js
index e90d81a60f..7281f5b637 100644
--- a/test/runtime/samples/attribute-null-classnames-no-style/_config.js
+++ b/test/runtime/samples/attribute-null-classnames-no-style/_config.js
@@ -1,10 +1,10 @@
 export default {
 	props: {
-		testName1: "test1",
-		testName2: "test2"
+		testName1: 'test1',
+		testName2: 'test2'
 	},
 
-	html: `<div class="test1test2"></div>`,
+	html: '<div class="test1test2"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
@@ -15,11 +15,11 @@ export default {
 		assert.equal(div.className, '0');
 
 		component.testName1 = null;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'nulltest');
 
 		component.testName1 = undefined;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'undefinedtest');
 
 		component.testName1 = undefined;
diff --git a/test/runtime/samples/attribute-null-classnames-with-style/_config.js b/test/runtime/samples/attribute-null-classnames-with-style/_config.js
index 20e6d4c7be..547e62427f 100644
--- a/test/runtime/samples/attribute-null-classnames-with-style/_config.js
+++ b/test/runtime/samples/attribute-null-classnames-with-style/_config.js
@@ -1,10 +1,10 @@
 export default {
 	props: {
-		testName1: "test1",
-		testName2: "test2"
+		testName1: 'test1',
+		testName2: 'test2'
 	},
 
-	html: `<div class="test1test2 svelte-x1o6ra"></div>`,
+	html: '<div class="test1test2 svelte-x1o6ra"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
@@ -15,11 +15,11 @@ export default {
 		assert.equal(div.className, '0 svelte-x1o6ra');
 
 		component.testName1 = null;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'nulltest svelte-x1o6ra');
 
 		component.testName1 = undefined;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'undefinedtest svelte-x1o6ra');
 
 		component.testName1 = undefined;
diff --git a/test/runtime/samples/attribute-null-func-classname-no-style/_config.js b/test/runtime/samples/attribute-null-func-classname-no-style/_config.js
index 4a78b680ef..6cfefc8834 100644
--- a/test/runtime/samples/attribute-null-func-classname-no-style/_config.js
+++ b/test/runtime/samples/attribute-null-func-classname-no-style/_config.js
@@ -1,9 +1,9 @@
 export default {
 	props: {
-		testName: "testClassName"
+		testName: 'testClassName'
 	},
 
-	html: `<div class="testClassName"></div>`,
+	html: '<div class="testClassName"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
diff --git a/test/runtime/samples/attribute-null-func-classname-with-style/_config.js b/test/runtime/samples/attribute-null-func-classname-with-style/_config.js
index 1ed43d05b9..435a679da7 100644
--- a/test/runtime/samples/attribute-null-func-classname-with-style/_config.js
+++ b/test/runtime/samples/attribute-null-func-classname-with-style/_config.js
@@ -1,9 +1,9 @@
 export default {
 	props: {
-		testName: "testClassName"
+		testName: 'testClassName'
 	},
 
-	html: `<div class="testClassName svelte-x1o6ra"></div>`,
+	html: '<div class="testClassName svelte-x1o6ra"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
diff --git a/test/runtime/samples/attribute-null-func-classnames-no-style/_config.js b/test/runtime/samples/attribute-null-func-classnames-no-style/_config.js
index e90d81a60f..7281f5b637 100644
--- a/test/runtime/samples/attribute-null-func-classnames-no-style/_config.js
+++ b/test/runtime/samples/attribute-null-func-classnames-no-style/_config.js
@@ -1,10 +1,10 @@
 export default {
 	props: {
-		testName1: "test1",
-		testName2: "test2"
+		testName1: 'test1',
+		testName2: 'test2'
 	},
 
-	html: `<div class="test1test2"></div>`,
+	html: '<div class="test1test2"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
@@ -15,11 +15,11 @@ export default {
 		assert.equal(div.className, '0');
 
 		component.testName1 = null;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'nulltest');
 
 		component.testName1 = undefined;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'undefinedtest');
 
 		component.testName1 = undefined;
diff --git a/test/runtime/samples/attribute-null-func-classnames-with-style/_config.js b/test/runtime/samples/attribute-null-func-classnames-with-style/_config.js
index 20e6d4c7be..547e62427f 100644
--- a/test/runtime/samples/attribute-null-func-classnames-with-style/_config.js
+++ b/test/runtime/samples/attribute-null-func-classnames-with-style/_config.js
@@ -1,10 +1,10 @@
 export default {
 	props: {
-		testName1: "test1",
-		testName2: "test2"
+		testName1: 'test1',
+		testName2: 'test2'
 	},
 
-	html: `<div class="test1test2 svelte-x1o6ra"></div>`,
+	html: '<div class="test1test2 svelte-x1o6ra"></div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector('div');
@@ -15,11 +15,11 @@ export default {
 		assert.equal(div.className, '0 svelte-x1o6ra');
 
 		component.testName1 = null;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'nulltest svelte-x1o6ra');
 
 		component.testName1 = undefined;
-		component.testName2 = "test";
+		component.testName2 = 'test';
 		assert.equal(div.className, 'undefinedtest svelte-x1o6ra');
 
 		component.testName1 = undefined;
diff --git a/test/runtime/samples/attribute-null/_config.js b/test/runtime/samples/attribute-null/_config.js
index 36955050a0..ded19eef79 100644
--- a/test/runtime/samples/attribute-null/_config.js
+++ b/test/runtime/samples/attribute-null/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div></div>`
+	html: '<div></div>'
 };
diff --git a/test/runtime/samples/attribute-static-at-symbol/_config.js b/test/runtime/samples/attribute-static-at-symbol/_config.js
index 40a45579a3..b2fb3afb87 100644
--- a/test/runtime/samples/attribute-static-at-symbol/_config.js
+++ b/test/runtime/samples/attribute-static-at-symbol/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<a href='mailto:hello@example.com'>email</a>`
+	html: "<a href='mailto:hello@example.com'>email</a>"
 };
\ No newline at end of file
diff --git a/test/runtime/samples/attribute-static-boolean/_config.js b/test/runtime/samples/attribute-static-boolean/_config.js
index c8b4332386..3dba036319 100644
--- a/test/runtime/samples/attribute-static-boolean/_config.js
+++ b/test/runtime/samples/attribute-static-boolean/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<textarea readonly=""></textarea>`,
+	html: '<textarea readonly=""></textarea>',
 	test({ assert, component, target }) {
 		const textarea = target.querySelector( 'textarea' );
 		assert.ok( textarea.readOnly );
diff --git a/test/runtime/samples/attribute-static/_config.js b/test/runtime/samples/attribute-static/_config.js
index 5d3b9c81a8..60c3cb2fc0 100644
--- a/test/runtime/samples/attribute-static/_config.js
+++ b/test/runtime/samples/attribute-static/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div class="foo"></div>`
+	html: '<div class="foo"></div>'
 };
diff --git a/test/runtime/samples/attribute-undefined/_config.js b/test/runtime/samples/attribute-undefined/_config.js
index 36955050a0..ded19eef79 100644
--- a/test/runtime/samples/attribute-undefined/_config.js
+++ b/test/runtime/samples/attribute-undefined/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div></div>`
+	html: '<div></div>'
 };
diff --git a/test/runtime/samples/await-catch-shorthand/_config.js b/test/runtime/samples/await-catch-shorthand/_config.js
index 2e1574145f..aea2eb0905 100644
--- a/test/runtime/samples/await-catch-shorthand/_config.js
+++ b/test/runtime/samples/await-catch-shorthand/_config.js
@@ -9,14 +9,14 @@ export default {
 		thePromise
 	},
 
-	html: ``,
+	html: '',
 
 	test({ assert, component, target }) {
 		fulfil(42);
 
 		return thePromise
 			.then(() => {
-				assert.htmlEqual(target.innerHTML, ``);
+				assert.htmlEqual(target.innerHTML, '');
 
 				let reject;
 
@@ -26,7 +26,7 @@ export default {
 
 				component.thePromise = thePromise;
 
-				assert.htmlEqual(target.innerHTML, ``);
+				assert.htmlEqual(target.innerHTML, '');
 
 				reject(new Error('something broke'));
 
diff --git a/test/runtime/samples/await-containing-if/_config.js b/test/runtime/samples/await-containing-if/_config.js
index cd83585cc1..5bf94ed012 100644
--- a/test/runtime/samples/await-containing-if/_config.js
+++ b/test/runtime/samples/await-containing-if/_config.js
@@ -24,7 +24,7 @@ export default {
 				`);
 
 				component.show = false;
-				assert.htmlEqual(target.innerHTML, `<div></div>`);
+				assert.htmlEqual(target.innerHTML, '<div></div>');
 
 				component.show = true;
 				assert.htmlEqual(target.innerHTML, `
diff --git a/test/runtime/samples/await-in-removed-if/_config.js b/test/runtime/samples/await-in-removed-if/_config.js
index 2f96f08e24..0746a66fa0 100644
--- a/test/runtime/samples/await-in-removed-if/_config.js
+++ b/test/runtime/samples/await-in-removed-if/_config.js
@@ -9,7 +9,7 @@ export default {
 		promise
 	},
 
-	html: ``,
+	html: '',
 
 	async test({ assert, component, target }) {
 		component.condition = false;
@@ -17,6 +17,6 @@ export default {
 		fulfil();
 		await new Promise(f => setTimeout(f, 0));
 
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/await-set-simultaneous-reactive/_config.js b/test/runtime/samples/await-set-simultaneous-reactive/_config.js
index a591bf424f..acbd7aea1f 100644
--- a/test/runtime/samples/await-set-simultaneous-reactive/_config.js
+++ b/test/runtime/samples/await-set-simultaneous-reactive/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<p>wait for it...</p>`,
+	html: '<p>wait for it...</p>',
 	test({ assert, component, target }) {
 
 		return component.promise
diff --git a/test/runtime/samples/await-set-simultaneous/_config.js b/test/runtime/samples/await-set-simultaneous/_config.js
index f9ed64e556..d928e39c23 100644
--- a/test/runtime/samples/await-set-simultaneous/_config.js
+++ b/test/runtime/samples/await-set-simultaneous/_config.js
@@ -6,7 +6,7 @@ export default {
 
 		component.promise = promise;
 
-		assert.htmlEqual(target.innerHTML, `<p>wait for it...</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>wait for it...</p>');
 
 		return promise
 			.then(() => {
diff --git a/test/runtime/samples/await-then-catch-no-values/_config.js b/test/runtime/samples/await-then-catch-no-values/_config.js
index 2c3ce45dc1..51a79a50d0 100644
--- a/test/runtime/samples/await-then-catch-no-values/_config.js
+++ b/test/runtime/samples/await-then-catch-no-values/_config.js
@@ -9,14 +9,14 @@ export default {
 		thePromise
 	},
 
-	html: `waiting`,
+	html: 'waiting',
 
 	test({ assert, component, target }) {
 		fulfil(9000);
 
 		return thePromise
 			.then(() => {
-				assert.htmlEqual(target.innerHTML, `resolved`);
+				assert.htmlEqual(target.innerHTML, 'resolved');
 
 				let reject;
 
@@ -26,14 +26,14 @@ export default {
 
 				component.thePromise = thePromise;
 
-				assert.htmlEqual(target.innerHTML, `waiting`);
+				assert.htmlEqual(target.innerHTML, 'waiting');
 
 				reject(new Error('something broke'));
 
 				return thePromise.catch(() => {});
 			})
 			.then(() => {
-				assert.htmlEqual(target.innerHTML, `rejected`);
+				assert.htmlEqual(target.innerHTML, 'rejected');
 			});
 	}
 };
diff --git a/test/runtime/samples/await-then-destruct-object/_config.js b/test/runtime/samples/await-then-destruct-object/_config.js
index 371462de97..7d08ad3711 100644
--- a/test/runtime/samples/await-then-destruct-object/_config.js
+++ b/test/runtime/samples/await-then-destruct-object/_config.js
@@ -8,7 +8,7 @@ export default {
 	`,
 
 	async test({ assert, component, target }) {
-		await (component.thePromise = Promise.resolve({ error: "error message" }));
+		await (component.thePromise = Promise.resolve({ error: 'error message' }));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -18,7 +18,7 @@ export default {
 			`
 		);
 
-		await (component.thePromise = Promise.resolve({ result: "42" }));
+		await (component.thePromise = Promise.resolve({ result: '42' }));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -30,7 +30,7 @@ export default {
 
 		try {
 			await (component.thePromise = Promise.reject({
-				error: { message: "oops", code: "123" }
+				error: { message: 'oops', code: '123' }
 			}));
 		} catch (e) {
 			// do nothing
@@ -46,7 +46,7 @@ export default {
 
 		try {
 			await (component.thePromise = Promise.reject({
-				error: { message: "timeout", code: "456" }
+				error: { message: 'timeout', code: '456' }
 			}));
 		} catch (e) {
 			// do nothing
diff --git a/test/runtime/samples/await-then-shorthand/_config.js b/test/runtime/samples/await-then-shorthand/_config.js
index 4635cf5127..be517af70d 100644
--- a/test/runtime/samples/await-then-shorthand/_config.js
+++ b/test/runtime/samples/await-then-shorthand/_config.js
@@ -9,7 +9,7 @@ export default {
 		thePromise
 	},
 
-	html: ``,
+	html: '',
 
 	test({ assert, component, target }) {
 		fulfil(42);
@@ -28,7 +28,7 @@ export default {
 
 				component.thePromise = thePromise;
 
-				assert.htmlEqual(target.innerHTML, ``);
+				assert.htmlEqual(target.innerHTML, '');
 
 				reject(new Error('something broke'));
 
diff --git a/test/runtime/samples/await-with-update-2/_config.js b/test/runtime/samples/await-with-update-2/_config.js
index 613f2b3255..68f884c127 100644
--- a/test/runtime/samples/await-with-update-2/_config.js
+++ b/test/runtime/samples/await-with-update-2/_config.js
@@ -9,7 +9,7 @@ export default {
 	`,
 
 	async test({ assert, component, target }) {
-		await (component.thePromise = Promise.resolve({ value: "success", Component: component.Component }));
+		await (component.thePromise = Promise.resolve({ value: 'success', Component: component.Component }));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -34,7 +34,7 @@ export default {
 		);
 
 		try {
-			await (component.thePromise = Promise.reject({ value: "failure", Component: component.Component }));
+			await (component.thePromise = Promise.reject({ value: 'failure', Component: component.Component }));
 		} catch (error) {
 			// ignore
 		}
diff --git a/test/runtime/samples/binding-input-checkbox-with-event-in-each/_config.js b/test/runtime/samples/binding-input-checkbox-with-event-in-each/_config.js
index 9e6f915dd0..1247414c1c 100644
--- a/test/runtime/samples/binding-input-checkbox-with-event-in-each/_config.js
+++ b/test/runtime/samples/binding-input-checkbox-with-event-in-each/_config.js
@@ -2,11 +2,11 @@ export default {
 	props: {
 		cats: [
 			{
-				name: "cat 0",
+				name: 'cat 0',
 				checked: false
 			},
 			{
-				name: "cat 1",
+				name: 'cat 1',
 				checked: false
 			}
 		]
@@ -21,7 +21,7 @@ export default {
 		const { cats } = component;
 		const newCats = cats.slice();
 		newCats.push({
-			name: "cat " + cats.length,
+			name: 'cat ' + cats.length,
 			checked: false
 		});
 		component.cats = newCats;
diff --git a/test/runtime/samples/binding-input-group-duplicate-value/_config.js b/test/runtime/samples/binding-input-group-duplicate-value/_config.js
index 7f50ad6dce..b5f3ae0115 100644
--- a/test/runtime/samples/binding-input-group-duplicate-value/_config.js
+++ b/test/runtime/samples/binding-input-group-duplicate-value/_config.js
@@ -18,8 +18,8 @@ export default {
 	`,
 
 	async test({ assert, component, target, window }) {
-		const inputs = target.querySelectorAll("input");
-		const p = target.querySelector("p");
+		const inputs = target.querySelectorAll('input');
+		const p = target.querySelector('p');
 
 		assert.equal(inputs[0].checked, false);
 		assert.equal(inputs[1].checked, false);
@@ -31,12 +31,12 @@ export default {
 		assert.equal(inputs[6].checked, false);
 		assert.equal(inputs[7].checked, false);
 
-		const event = new window.Event("change");
+		const event = new window.Event('change');
 
 		inputs[0].checked = true;
 		await inputs[0].dispatchEvent(event);
 
-		assert.htmlEqual(p.innerHTML, `Checked: a`);
+		assert.htmlEqual(p.innerHTML, 'Checked: a');
 
 		assert.equal(inputs[0].checked, true);
 		assert.equal(inputs[1].checked, false);
@@ -51,7 +51,7 @@ export default {
 		inputs[3].checked = true;
 		await inputs[3].dispatchEvent(event);
 
-		assert.htmlEqual(p.innerHTML, `Checked: a,d`);
+		assert.htmlEqual(p.innerHTML, 'Checked: a,d');
 
 		assert.equal(inputs[0].checked, true);
 		assert.equal(inputs[1].checked, false);
@@ -66,7 +66,7 @@ export default {
 		inputs[4].checked = false;
 		await inputs[4].dispatchEvent(event);
 
-		assert.htmlEqual(p.innerHTML, `Checked: d`);
+		assert.htmlEqual(p.innerHTML, 'Checked: d');
 
 		assert.equal(inputs[0].checked, false);
 		assert.equal(inputs[1].checked, false);
diff --git a/test/runtime/samples/binding-input-number-2/_config.js b/test/runtime/samples/binding-input-number-2/_config.js
index 5daf50fd04..4411eac0b2 100644
--- a/test/runtime/samples/binding-input-number-2/_config.js
+++ b/test/runtime/samples/binding-input-number-2/_config.js
@@ -1,31 +1,31 @@
 export default {
 	test({ assert, target, window, component }) {
-		const input = target.querySelector("input");
-		const inputEvent = new window.InputEvent("input");
+		const input = target.querySelector('input');
+		const inputEvent = new window.InputEvent('input');
 		assert.equal(component.value, 5);
-		assert.equal(input.value, "5");
+		assert.equal(input.value, '5');
 
-		input.value = "5.";
+		input.value = '5.';
 		input.dispatchEvent(inputEvent);
 
 		// input type number has value === "" if ends with dot/comma
 		assert.equal(component.value, undefined);
-		assert.equal(input.value, "");
+		assert.equal(input.value, '');
 
-		input.value = "5.5";
+		input.value = '5.5';
 		input.dispatchEvent(inputEvent);
 
 		assert.equal(component.value, 5.5);
-		assert.equal(input.value, "5.5");
+		assert.equal(input.value, '5.5');
 
-		input.value = "5.50";
+		input.value = '5.50';
 		input.dispatchEvent(inputEvent);
 
 		assert.equal(component.value, 5.5);
-		assert.equal(input.value, "5.50");
+		assert.equal(input.value, '5.50');
 
 		component.value = 1;
 		assert.equal(component.value, 1);
-		assert.equal(input.value, "1");
+		assert.equal(input.value, '1');
 	}
 };
diff --git a/test/runtime/samples/binding-select-in-yield/_config.js b/test/runtime/samples/binding-select-in-yield/_config.js
index 11dcb3d58c..042fba832b 100644
--- a/test/runtime/samples/binding-select-in-yield/_config.js
+++ b/test/runtime/samples/binding-select-in-yield/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: ``,
+	html: '',
 
 	props: {
 		letter: 'b'
diff --git a/test/runtime/samples/binding-this-each-block-property-2/_config.js b/test/runtime/samples/binding-this-each-block-property-2/_config.js
index 5c288cd6d1..b67d27050e 100644
--- a/test/runtime/samples/binding-this-each-block-property-2/_config.js
+++ b/test/runtime/samples/binding-this-each-block-property-2/_config.js
@@ -3,7 +3,7 @@ function callback(refs) {
 	calls.push(refs.map(({ ref }) => ({ ref })));
 }
 export default {
-	html: ``,
+	html: '',
 	props: {
 		callback
 	},
@@ -16,7 +16,7 @@ export default {
 
 		await component.addItem();
 
-		let divs = target.querySelectorAll("div");
+		let divs = target.querySelectorAll('div');
 
 		assert.equal(calls.length, 3);
 		assert.equal(calls[1].length, 1);
@@ -26,7 +26,7 @@ export default {
 
 		await component.addItem();
 
-		divs = target.querySelectorAll("div");
+		divs = target.querySelectorAll('div');
 
 		assert.equal(calls.length, 5);
 		assert.equal(calls[3].length, 2);
@@ -38,7 +38,7 @@ export default {
 
 		await component.addItem();
 
-		divs = target.querySelectorAll("div");
+		divs = target.querySelectorAll('div');
 
 		assert.equal(calls.length, 7);
 		assert.equal(calls[5].length, 3);
diff --git a/test/runtime/samples/binding-this-each-block-property-component/_config.js b/test/runtime/samples/binding-this-each-block-property-component/_config.js
index 947ec17929..3346888555 100644
--- a/test/runtime/samples/binding-this-each-block-property-component/_config.js
+++ b/test/runtime/samples/binding-this-each-block-property-component/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: ``,
+	html: '',
 
 	async test({ assert, component, target }) {
 		component.visible = true;
diff --git a/test/runtime/samples/binding-this-each-block-property/_config.js b/test/runtime/samples/binding-this-each-block-property/_config.js
index 15ad4be5db..bb24bcc0bf 100644
--- a/test/runtime/samples/binding-this-each-block-property/_config.js
+++ b/test/runtime/samples/binding-this-each-block-property/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: ``,
+	html: '',
 
 	async test({ assert, component, target }) {
 		component.visible = true;
diff --git a/test/runtime/samples/binding-this-each-object-props/_config.js b/test/runtime/samples/binding-this-each-object-props/_config.js
index 5372667b82..e9ec7d90f0 100644
--- a/test/runtime/samples/binding-this-each-object-props/_config.js
+++ b/test/runtime/samples/binding-this-each-object-props/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: ``,
+	html: '',
 
 	async test({ assert, component, target }) {
 		component.visible = true;
diff --git a/test/runtime/samples/binding-this-each-object-spread/_config.js b/test/runtime/samples/binding-this-each-object-spread/_config.js
index cecec08db9..e88ebe8de5 100644
--- a/test/runtime/samples/binding-this-each-object-spread/_config.js
+++ b/test/runtime/samples/binding-this-each-object-spread/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: ``,
+	html: '',
 
 	async test({ assert, component, target }) {
 		component.visible = true;
diff --git a/test/runtime/samples/binding-this-store/_config.js b/test/runtime/samples/binding-this-store/_config.js
index f818c2e31e..32bc9c4ce9 100644
--- a/test/runtime/samples/binding-this-store/_config.js
+++ b/test/runtime/samples/binding-this-store/_config.js
@@ -1,4 +1,4 @@
 export default {
 	skip_if_ssr: true,
-	html: `<div>object</div>`
+	html: '<div>object</div>'
 };
diff --git a/test/runtime/samples/binding-width-height-a11y/_config.js b/test/runtime/samples/binding-width-height-a11y/_config.js
index 93856bf0f6..198051e6d2 100644
--- a/test/runtime/samples/binding-width-height-a11y/_config.js
+++ b/test/runtime/samples/binding-width-height-a11y/_config.js
@@ -2,7 +2,7 @@ export default {
 	async test({ assert, target }) {
 		const iframe = target.querySelector('iframe');
 
-		assert.equal(iframe.getAttribute('aria-hidden'), "true");
-		assert.equal(iframe.getAttribute('tabindex'), "-1");
+		assert.equal(iframe.getAttribute('aria-hidden'), 'true');
+		assert.equal(iframe.getAttribute('tabindex'), '-1');
 	}
 };
diff --git a/test/runtime/samples/bitmask-overflow-2/_config.js b/test/runtime/samples/bitmask-overflow-2/_config.js
index 7304f6fa68..1b0f475e94 100644
--- a/test/runtime/samples/bitmask-overflow-2/_config.js
+++ b/test/runtime/samples/bitmask-overflow-2/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: `potato is not defined`
+	error: 'potato is not defined'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/bitmask-overflow-3/_config.js b/test/runtime/samples/bitmask-overflow-3/_config.js
index a55a73af1d..7c237c48f6 100644
--- a/test/runtime/samples/bitmask-overflow-3/_config.js
+++ b/test/runtime/samples/bitmask-overflow-3/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: `A is not defined`
+	error: 'A is not defined'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/bitmask-overflow-if/_config.js b/test/runtime/samples/bitmask-overflow-if/_config.js
index 74bc70d414..49f48925c5 100644
--- a/test/runtime/samples/bitmask-overflow-if/_config.js
+++ b/test/runtime/samples/bitmask-overflow-if/_config.js
@@ -7,8 +7,8 @@ export default {
 	`,
 
 	async test({ assert, component, target, window }) {
-		const button = target.querySelector("button");
-		await button.dispatchEvent(new window.MouseEvent("click"));
+		const button = target.querySelector('button');
+		await button.dispatchEvent(new window.MouseEvent('click'));
 
 		assert.htmlEqual(
 			target.innerHTML,
diff --git a/test/runtime/samples/class-boolean/_config.js b/test/runtime/samples/class-boolean/_config.js
index a5003566cc..ac02a1a425 100644
--- a/test/runtime/samples/class-boolean/_config.js
+++ b/test/runtime/samples/class-boolean/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div class="one"></div>`
+	html: '<div class="one"></div>'
 };
diff --git a/test/runtime/samples/class-helper/_config.js b/test/runtime/samples/class-helper/_config.js
index c38cc88240..6a62476493 100644
--- a/test/runtime/samples/class-helper/_config.js
+++ b/test/runtime/samples/class-helper/_config.js
@@ -3,7 +3,7 @@ export default {
 		user: { active: true }
 	},
 
-	html: `<div class="active"></div>`,
+	html: '<div class="active"></div>',
 
 	test({ assert, component, target }) {
 		component.user = { active: false };
diff --git a/test/runtime/samples/class-shortcut-with-class/_config.js b/test/runtime/samples/class-shortcut-with-class/_config.js
index fc1a00e8aa..6d647e8f9d 100644
--- a/test/runtime/samples/class-shortcut-with-class/_config.js
+++ b/test/runtime/samples/class-shortcut-with-class/_config.js
@@ -5,7 +5,7 @@ export default {
 		myClass: 'one two'
 	},
 
-	html: `<div class="one two foo bar"></div>`,
+	html: '<div class="one two foo bar"></div>',
 
 	test({ assert, component, target, window }) {
 		component.foo = false;
diff --git a/test/runtime/samples/class-shortcut/_config.js b/test/runtime/samples/class-shortcut/_config.js
index e0c8aec3a5..aba7e0e031 100644
--- a/test/runtime/samples/class-shortcut/_config.js
+++ b/test/runtime/samples/class-shortcut/_config.js
@@ -4,7 +4,7 @@ export default {
 		bar: true
 	},
 
-	html: `<div class="foo bar"></div>`,
+	html: '<div class="foo bar"></div>',
 
 	test({ assert, component, target, window }) {
 		component.foo = false;
diff --git a/test/runtime/samples/class-with-attribute/_config.js b/test/runtime/samples/class-with-attribute/_config.js
index 719e6bd473..7550b215ab 100644
--- a/test/runtime/samples/class-with-attribute/_config.js
+++ b/test/runtime/samples/class-with-attribute/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div class="one two three"></div>`
+	html: '<div class="one two three"></div>'
 };
diff --git a/test/runtime/samples/class-with-dynamic-attribute-and-spread/_config.js b/test/runtime/samples/class-with-dynamic-attribute-and-spread/_config.js
index 58ccc76497..f704e9327f 100644
--- a/test/runtime/samples/class-with-dynamic-attribute-and-spread/_config.js
+++ b/test/runtime/samples/class-with-dynamic-attribute-and-spread/_config.js
@@ -6,7 +6,7 @@ export default {
 		}
 	},
 
-	html: `<div class="one two three" role="button"></div>`,
+	html: '<div class="one two three" role="button"></div>',
 
 	test({ assert, component, target, window }) {
 		component.myClass = 'one';
diff --git a/test/runtime/samples/class-with-dynamic-attribute/_config.js b/test/runtime/samples/class-with-dynamic-attribute/_config.js
index 12c955c24d..2be6500674 100644
--- a/test/runtime/samples/class-with-dynamic-attribute/_config.js
+++ b/test/runtime/samples/class-with-dynamic-attribute/_config.js
@@ -3,7 +3,7 @@ export default {
 		myClass: 'one two'
 	},
 
-	html: `<div class="one two three"></div>`,
+	html: '<div class="one two three"></div>',
 
 	test({ assert, component, target, window }) {
 		component.myClass = 'one';
diff --git a/test/runtime/samples/class-with-spread-and-bind/_config.js b/test/runtime/samples/class-with-spread-and-bind/_config.js
index cab46706ef..7b50502f34 100644
--- a/test/runtime/samples/class-with-spread-and-bind/_config.js
+++ b/test/runtime/samples/class-with-spread-and-bind/_config.js
@@ -3,7 +3,7 @@ export default {
 		primary: true
 	},
 
-	html: `<div class="test-class primary" role="button"></div>`,
+	html: '<div class="test-class primary" role="button"></div>',
 
 	test({ assert, component, target, window }) {
 		component.primary = true;
diff --git a/test/runtime/samples/class-with-spread/_config.js b/test/runtime/samples/class-with-spread/_config.js
index d5233a5849..c7c85e38b0 100644
--- a/test/runtime/samples/class-with-spread/_config.js
+++ b/test/runtime/samples/class-with-spread/_config.js
@@ -6,7 +6,7 @@ export default {
 		}
 	},
 
-	html: `<div class="one two" role="button"></div>`,
+	html: '<div class="one two" role="button"></div>',
 
 	test({ assert, component, target, window }) {
 		component.myClass = 'one';
diff --git a/test/runtime/samples/component-binding-store/_config.js b/test/runtime/samples/component-binding-store/_config.js
index 8b8a7a170a..d17b9e2d80 100644
--- a/test/runtime/samples/component-binding-store/_config.js
+++ b/test/runtime/samples/component-binding-store/_config.js
@@ -11,10 +11,10 @@ export default {
 			count++;
 		};
 
-		const [input1, input2] = target.querySelectorAll("input");
+		const [input1, input2] = target.querySelectorAll('input');
 
-		input1.value = "1";
-		await input1.dispatchEvent(new window.Event("input"));
+		input1.value = '1';
+		await input1.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -24,12 +24,12 @@ export default {
 				<div>1</div>
 			`
 		);
-		assert.equal(input1.value, "1");
-		assert.equal(input2.value, "1");
+		assert.equal(input1.value, '1');
+		assert.equal(input2.value, '1');
 		assert.equal(count, 1);
 
-		input2.value = "123";
-		await input2.dispatchEvent(new window.Event("input"));
+		input2.value = '123';
+		await input2.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -39,12 +39,12 @@ export default {
 				<div>123</div>
 			`
 		);
-		assert.equal(input1.value, "123");
-		assert.equal(input2.value, "123");
+		assert.equal(input1.value, '123');
+		assert.equal(input2.value, '123');
 		assert.equal(count, 2);
 
-		input1.value = "456";
-		await input1.dispatchEvent(new window.Event("input"));
+		input1.value = '456';
+		await input1.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -54,8 +54,8 @@ export default {
 				<div>456</div>
 			`
 		);
-		assert.equal(input1.value, "456");
-		assert.equal(input2.value, "456");
+		assert.equal(input1.value, '456');
+		assert.equal(input2.value, '456');
 		assert.equal(count, 3);
 	}
 };
diff --git a/test/runtime/samples/component-data-dynamic-shorthand/_config.js b/test/runtime/samples/component-data-dynamic-shorthand/_config.js
index 80e8731dc5..779966d4aa 100644
--- a/test/runtime/samples/component-data-dynamic-shorthand/_config.js
+++ b/test/runtime/samples/component-data-dynamic-shorthand/_config.js
@@ -3,11 +3,11 @@ export default {
 		foo: 42
 	},
 
-	html: `<div><p>foo: 42</p></div>`,
+	html: '<div><p>foo: 42</p></div>',
 
 	test({ assert, component, target }) {
 		component.foo = 99;
 
-		assert.equal( target.innerHTML, `<div><p>foo: 99</p></div>` );
+		assert.equal( target.innerHTML, '<div><p>foo: 99</p></div>' );
 	}
 };
diff --git a/test/runtime/samples/component-data-empty/_config.js b/test/runtime/samples/component-data-empty/_config.js
index eaf16a72af..486827f398 100644
--- a/test/runtime/samples/component-data-empty/_config.js
+++ b/test/runtime/samples/component-data-empty/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div><p>foo: ''</p></div>`
+	html: "<div><p>foo: ''</p></div>"
 };
diff --git a/test/runtime/samples/component-data-static-boolean-regression/_config.js b/test/runtime/samples/component-data-static-boolean-regression/_config.js
index 61f8ba0a06..93d0f1165c 100644
--- a/test/runtime/samples/component-data-static-boolean-regression/_config.js
+++ b/test/runtime/samples/component-data-static-boolean-regression/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<a href='/cool'>link</a>`
+	html: "<a href='/cool'>link</a>"
 };
diff --git a/test/runtime/samples/component-data-static-boolean/_config.js b/test/runtime/samples/component-data-static-boolean/_config.js
index aaaf3de630..7253644c64 100644
--- a/test/runtime/samples/component-data-static-boolean/_config.js
+++ b/test/runtime/samples/component-data-static-boolean/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>x: true (boolean)</p>`
+	html: '<p>x: true (boolean)</p>'
 };
diff --git a/test/runtime/samples/component-shorthand-import/_config.js b/test/runtime/samples/component-shorthand-import/_config.js
index c955224600..dd60415537 100644
--- a/test/runtime/samples/component-shorthand-import/_config.js
+++ b/test/runtime/samples/component-shorthand-import/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>This is the widget.</p>`
+	html: '<p>This is the widget.</p>'
 };
diff --git a/test/runtime/samples/component-slot-chained/_config.js b/test/runtime/samples/component-slot-chained/_config.js
index 6c028f8c31..f2f71df8d6 100644
--- a/test/runtime/samples/component-slot-chained/_config.js
+++ b/test/runtime/samples/component-slot-chained/_config.js
@@ -3,6 +3,6 @@ export default {
 
 	test({ assert, component, target }) {
 		component.text = 'two';
-		assert.htmlEqual(target.innerHTML, `two`);
+		assert.htmlEqual(target.innerHTML, 'two');
 	}
 };
diff --git a/test/runtime/samples/component-slot-empty-b/_config.js b/test/runtime/samples/component-slot-empty-b/_config.js
index 8c1b13b1d5..388e1a3e4a 100644
--- a/test/runtime/samples/component-slot-empty-b/_config.js
+++ b/test/runtime/samples/component-slot-empty-b/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<div><input slot="slot1"></div>`
+	html: '<div><input slot="slot1"></div>'
 };
diff --git a/test/runtime/samples/component-slot-fallback-2/_config.js b/test/runtime/samples/component-slot-fallback-2/_config.js
index 585e3b4c9e..7c86357a8e 100644
--- a/test/runtime/samples/component-slot-fallback-2/_config.js
+++ b/test/runtime/samples/component-slot-fallback-2/_config.js
@@ -1,21 +1,21 @@
 export default {
-	html: `<input> <input> <input>`,
-	ssrHtml: `<input value="Blub"> <input value="Blub"> <input value="Blub">`,
+	html: '<input> <input> <input>',
+	ssrHtml: '<input value="Blub"> <input value="Blub"> <input value="Blub">',
 
 	async test({ assert, target, component, window }) {
-		const [input1, input2, inputFallback] = target.querySelectorAll("input");
+		const [input1, input2, inputFallback] = target.querySelectorAll('input');
 
 		assert.equal(component.getSubscriberCount(), 3);
 
-		input1.value = "a";
-		await input1.dispatchEvent(new window.Event("input"));
-		input1.value = "ab";
-		await input1.dispatchEvent(new window.Event("input"));
-		assert.equal(input1.value, "ab");
-		assert.equal(input2.value, "ab");
-		assert.equal(inputFallback.value, "ab");
+		input1.value = 'a';
+		await input1.dispatchEvent(new window.Event('input'));
+		input1.value = 'ab';
+		await input1.dispatchEvent(new window.Event('input'));
+		assert.equal(input1.value, 'ab');
+		assert.equal(input2.value, 'ab');
+		assert.equal(inputFallback.value, 'ab');
 
-		component.props = "hello";
+		component.props = 'hello';
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -26,7 +26,7 @@ export default {
 			`
 		);
 
-		component.fallback = "world";
+		component.fallback = 'world';
 		assert.htmlEqual(
 			target.innerHTML,
 			`
diff --git a/test/runtime/samples/component-slot-fallback-5/_config.js b/test/runtime/samples/component-slot-fallback-5/_config.js
index fa374f3519..07d09a3be9 100644
--- a/test/runtime/samples/component-slot-fallback-5/_config.js
+++ b/test/runtime/samples/component-slot-fallback-5/_config.js
@@ -5,8 +5,8 @@ export default {
 	`,
 
 	async test({ assert, target, window }) {
-		const btn = target.querySelector("button");
-		const clickEvent = new window.MouseEvent("click");
+		const btn = target.querySelector('button');
+		const clickEvent = new window.MouseEvent('click');
 
 		await btn.dispatchEvent(clickEvent);
 
diff --git a/test/runtime/samples/component-slot-fallback-6/_config.js b/test/runtime/samples/component-slot-fallback-6/_config.js
index fb1a658f26..b32d96db2e 100644
--- a/test/runtime/samples/component-slot-fallback-6/_config.js
+++ b/test/runtime/samples/component-slot-fallback-6/_config.js
@@ -6,8 +6,8 @@ export default {
 	`,
 
 	async test({ assert, target, window }) {
-		const input = target.querySelector("input");
-		input.value = "abc";
+		const input = target.querySelector('input');
+		input.value = 'abc';
 		await input.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(target.innerHTML, `
diff --git a/test/runtime/samples/component-slot-let-static/_config.js b/test/runtime/samples/component-slot-let-static/_config.js
index 3067939b88..ede7a679c5 100644
--- a/test/runtime/samples/component-slot-let-static/_config.js
+++ b/test/runtime/samples/component-slot-let-static/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>Hi</p>`
+	html: '<p>Hi</p>'
 };
diff --git a/test/runtime/samples/component-slot-nested-error-2/_config.js b/test/runtime/samples/component-slot-nested-error-2/_config.js
index 98a9f1cab0..08c436b16d 100644
--- a/test/runtime/samples/component-slot-nested-error-2/_config.js
+++ b/test/runtime/samples/component-slot-nested-error-2/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: [`Element with a slot='...' attribute must be a child of a component or a descendant of a custom element`]
+	error: ["Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"]
 };
diff --git a/test/runtime/samples/component-slot-nested-error-3/_config.js b/test/runtime/samples/component-slot-nested-error-3/_config.js
index 98a9f1cab0..08c436b16d 100644
--- a/test/runtime/samples/component-slot-nested-error-3/_config.js
+++ b/test/runtime/samples/component-slot-nested-error-3/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: [`Element with a slot='...' attribute must be a child of a component or a descendant of a custom element`]
+	error: ["Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"]
 };
diff --git a/test/runtime/samples/component-slot-nested-error/_config.js b/test/runtime/samples/component-slot-nested-error/_config.js
index 98a9f1cab0..08c436b16d 100644
--- a/test/runtime/samples/component-slot-nested-error/_config.js
+++ b/test/runtime/samples/component-slot-nested-error/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: [`Element with a slot='...' attribute must be a child of a component or a descendant of a custom element`]
+	error: ["Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"]
 };
diff --git a/test/runtime/samples/component-static-at-symbol/_config.js b/test/runtime/samples/component-static-at-symbol/_config.js
index a2f60e3de7..0be19f091f 100644
--- a/test/runtime/samples/component-static-at-symbol/_config.js
+++ b/test/runtime/samples/component-static-at-symbol/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<a href='mailto:hello@example.com'>email</a>`
+	html: "<a href='mailto:hello@example.com'>email</a>"
 };
diff --git a/test/runtime/samples/component-yield-multiple-in-if/_config.js b/test/runtime/samples/component-yield-multiple-in-if/_config.js
index d5d630a84d..7263cc55aa 100644
--- a/test/runtime/samples/component-yield-multiple-in-if/_config.js
+++ b/test/runtime/samples/component-yield-multiple-in-if/_config.js
@@ -5,6 +5,6 @@ export default {
 
 	test({ assert, component, target }) {
 		component.arriving = false;
-		assert.htmlEqual(target.innerHTML, `<div><p class='widget'>Goodbye</p></div>`);
+		assert.htmlEqual(target.innerHTML, "<div><p class='widget'>Goodbye</p></div>");
 	}
 };
diff --git a/test/runtime/samples/component-yield-nested-if/_config.js b/test/runtime/samples/component-yield-nested-if/_config.js
index f16a7bb6bf..b46996cea3 100644
--- a/test/runtime/samples/component-yield-nested-if/_config.js
+++ b/test/runtime/samples/component-yield-nested-if/_config.js
@@ -6,9 +6,9 @@ export default {
 
 	test({ assert, component, target }) {
 		component.foo = false;
-		assert.htmlEqual( target.innerHTML, `` );
+		assert.htmlEqual( target.innerHTML, '' );
 
 		component.foo = true;
-		assert.htmlEqual( target.innerHTML, `One\nInner` );
+		assert.htmlEqual( target.innerHTML, 'One\nInner' );
 	}
 };
diff --git a/test/runtime/samples/contextual-callback/_config.js b/test/runtime/samples/contextual-callback/_config.js
index d47d9d001e..f0ec07f6c9 100644
--- a/test/runtime/samples/contextual-callback/_config.js
+++ b/test/runtime/samples/contextual-callback/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<button>click me</button>`,
+	html: '<button>click me</button>',
 
 	async test({ assert, component, target, window }) {
 		const button = target.querySelector('button');
diff --git a/test/runtime/samples/deconflict-anchor/_config.js b/test/runtime/samples/deconflict-anchor/_config.js
index 817dd42fcb..323cb7530a 100644
--- a/test/runtime/samples/deconflict-anchor/_config.js
+++ b/test/runtime/samples/deconflict-anchor/_config.js
@@ -1,4 +1,4 @@
 export default {
 	preserveIdentifiers: true,
-	html: `<p>Anchor</p>`
+	html: '<p>Anchor</p>'
 };
diff --git a/test/runtime/samples/deconflict-block-methods/_config.js b/test/runtime/samples/deconflict-block-methods/_config.js
index 2bb1aa8424..07c699df4d 100644
--- a/test/runtime/samples/deconflict-block-methods/_config.js
+++ b/test/runtime/samples/deconflict-block-methods/_config.js
@@ -2,5 +2,5 @@ export default {
 	compileOptions: {
 		dev: true
 	},
-	html: `<div>deconflicted</div>`
+	html: '<div>deconflicted</div>'
 };
diff --git a/test/runtime/samples/deconflict-builtins-2/_config.js b/test/runtime/samples/deconflict-builtins-2/_config.js
index 1489f83dc4..1bef35b2bd 100644
--- a/test/runtime/samples/deconflict-builtins-2/_config.js
+++ b/test/runtime/samples/deconflict-builtins-2/_config.js
@@ -1,4 +1,4 @@
 export default {
-	html: `<text>hello world</text>`,
+	html: '<text>hello world</text>',
 	preserveIdentifiers: true
 };
\ No newline at end of file
diff --git a/test/runtime/samples/deconflict-builtins/_config.js b/test/runtime/samples/deconflict-builtins/_config.js
index c7053194ee..4e9cbef4b2 100644
--- a/test/runtime/samples/deconflict-builtins/_config.js
+++ b/test/runtime/samples/deconflict-builtins/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<span>got</span>`,
+	html: '<span>got</span>',
 
 	test({ assert, component }) {
 		assert.equal(component.foo, 'got');
diff --git a/test/runtime/samples/deconflict-component-name-with-global/_config.js b/test/runtime/samples/deconflict-component-name-with-global/_config.js
index 4b8255868e..0f25c32351 100644
--- a/test/runtime/samples/deconflict-component-name-with-global/_config.js
+++ b/test/runtime/samples/deconflict-component-name-with-global/_config.js
@@ -5,5 +5,5 @@ export default {
 
 	preserveIdentifiers: true,
 
-	html: `<p>true</p>`
+	html: '<p>true</p>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/deconflict-component-name-with-module-global/_config.js b/test/runtime/samples/deconflict-component-name-with-module-global/_config.js
index 4b8255868e..0f25c32351 100644
--- a/test/runtime/samples/deconflict-component-name-with-module-global/_config.js
+++ b/test/runtime/samples/deconflict-component-name-with-module-global/_config.js
@@ -5,5 +5,5 @@ export default {
 
 	preserveIdentifiers: true,
 
-	html: `<p>true</p>`
+	html: '<p>true</p>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/deconflict-non-helpers/_config.js b/test/runtime/samples/deconflict-non-helpers/_config.js
index 167ddc279c..8bbdc872e5 100644
--- a/test/runtime/samples/deconflict-non-helpers/_config.js
+++ b/test/runtime/samples/deconflict-non-helpers/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `ABCD`,
+	html: 'ABCD',
 
 	test({ assert, component }) {
 		assert.equal(component.compute(), 'ABCD');
diff --git a/test/runtime/samples/deconflict-self/_config.js b/test/runtime/samples/deconflict-self/_config.js
index 86341e7379..44bea34e09 100644
--- a/test/runtime/samples/deconflict-self/_config.js
+++ b/test/runtime/samples/deconflict-self/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>nested component</p>`
+	html: '<p>nested component</p>'
 };
diff --git a/test/runtime/samples/deconflict-template-1/_config.js b/test/runtime/samples/deconflict-template-1/_config.js
index c7ca7bec26..faddb5b6fd 100644
--- a/test/runtime/samples/deconflict-template-1/_config.js
+++ b/test/runtime/samples/deconflict-template-1/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `template`
+	html: 'template'
 };
diff --git a/test/runtime/samples/deconflict-template-2/_config.js b/test/runtime/samples/deconflict-template-2/_config.js
index c7ca7bec26..faddb5b6fd 100644
--- a/test/runtime/samples/deconflict-template-2/_config.js
+++ b/test/runtime/samples/deconflict-template-2/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `template`
+	html: 'template'
 };
diff --git a/test/runtime/samples/deconflict-vars/_config.js b/test/runtime/samples/deconflict-vars/_config.js
index b3303b13fe..e66ce0f141 100644
--- a/test/runtime/samples/deconflict-vars/_config.js
+++ b/test/runtime/samples/deconflict-vars/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>ab</p>`
+	html: '<p>ab</p>'
 };
diff --git a/test/runtime/samples/destructuring/_config.js b/test/runtime/samples/destructuring/_config.js
index b8b138dfd0..c76a3bf649 100644
--- a/test/runtime/samples/destructuring/_config.js
+++ b/test/runtime/samples/destructuring/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<button>click me</button>`,
+	html: '<button>click me</button>',
 
 	props: {
 		foo: 42
diff --git a/test/runtime/samples/dev-warning-destroy-twice/_config.js b/test/runtime/samples/dev-warning-destroy-twice/_config.js
index 3acbd6447a..4f6090d4b6 100644
--- a/test/runtime/samples/dev-warning-destroy-twice/_config.js
+++ b/test/runtime/samples/dev-warning-destroy-twice/_config.js
@@ -15,7 +15,7 @@ export default {
 		component.$destroy();
 
 		assert.deepEqual(warnings, [
-			`Component was already destroyed`
+			'Component was already destroyed'
 		]);
 
 		console.warn = warn; // eslint-disable-line no-console
diff --git a/test/runtime/samples/dev-warning-each-block-no-sets-maps/_config.js b/test/runtime/samples/dev-warning-each-block-no-sets-maps/_config.js
index 83481d9ebe..036130c4e0 100644
--- a/test/runtime/samples/dev-warning-each-block-no-sets-maps/_config.js
+++ b/test/runtime/samples/dev-warning-each-block-no-sets-maps/_config.js
@@ -2,5 +2,5 @@ export default {
 	compileOptions: {
 		dev: true
 	},
-	error: `{#each} only iterates over array-like objects. You can use a spread to convert this iterable into an array.`
+	error: '{#each} only iterates over array-like objects. You can use a spread to convert this iterable into an array.'
 };
diff --git a/test/runtime/samples/dev-warning-each-block-require-arraylike/_config.js b/test/runtime/samples/dev-warning-each-block-require-arraylike/_config.js
index 62e5fc209b..ff6ef80607 100644
--- a/test/runtime/samples/dev-warning-each-block-require-arraylike/_config.js
+++ b/test/runtime/samples/dev-warning-each-block-require-arraylike/_config.js
@@ -2,5 +2,5 @@ export default {
 	compileOptions: {
 		dev: true
 	},
-	error: `{#each} only iterates over array-like objects.`
+	error: '{#each} only iterates over array-like objects.'
 };
diff --git a/test/runtime/samples/dev-warning-missing-data-binding/_config.js b/test/runtime/samples/dev-warning-missing-data-binding/_config.js
index f23c5d5ec5..1ba0dfc8ff 100644
--- a/test/runtime/samples/dev-warning-missing-data-binding/_config.js
+++ b/test/runtime/samples/dev-warning-missing-data-binding/_config.js
@@ -4,6 +4,6 @@ export default {
 	},
 
 	warnings: [
-		`<Main> was created without expected prop 'value'`
+		"<Main> was created without expected prop 'value'"
 	]
 };
diff --git a/test/runtime/samples/dev-warning-missing-data-component/_config.js b/test/runtime/samples/dev-warning-missing-data-component/_config.js
index a95e570988..ececa00a8c 100644
--- a/test/runtime/samples/dev-warning-missing-data-component/_config.js
+++ b/test/runtime/samples/dev-warning-missing-data-component/_config.js
@@ -4,6 +4,6 @@ export default {
 	},
 
 	warnings: [
-		`<Foo> was created without expected prop 'y'`
+		"<Foo> was created without expected prop 'y'"
 	]
 };
diff --git a/test/runtime/samples/dev-warning-missing-data/_config.js b/test/runtime/samples/dev-warning-missing-data/_config.js
index b929ff4741..f489491ac9 100644
--- a/test/runtime/samples/dev-warning-missing-data/_config.js
+++ b/test/runtime/samples/dev-warning-missing-data/_config.js
@@ -4,7 +4,7 @@ export default {
 	},
 
 	warnings: [
-		`<Main> was created without expected prop 'foo'`,
-		`<Main> was created without expected prop 'bar'`
+		"<Main> was created without expected prop 'foo'",
+		"<Main> was created without expected prop 'bar'"
 	]
 };
diff --git a/test/runtime/samples/dev-warning-readonly-computed/_config.js b/test/runtime/samples/dev-warning-readonly-computed/_config.js
index 33339071f4..7d02d82eeb 100644
--- a/test/runtime/samples/dev-warning-readonly-computed/_config.js
+++ b/test/runtime/samples/dev-warning-readonly-computed/_config.js
@@ -12,7 +12,7 @@ export default {
 			component.foo = 1;
 			throw new Error( 'Expected an error' );
 		} catch ( err ) {
-			assert.equal( err.message, `<Main>: Cannot set read-only property 'foo'` );
+			assert.equal( err.message, "<Main>: Cannot set read-only property 'foo'" );
 		}
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/dev-warning-readonly-window-binding/_config.js b/test/runtime/samples/dev-warning-readonly-window-binding/_config.js
index e0b46584e4..01c8717b0c 100644
--- a/test/runtime/samples/dev-warning-readonly-window-binding/_config.js
+++ b/test/runtime/samples/dev-warning-readonly-window-binding/_config.js
@@ -8,7 +8,7 @@ export default {
 			component.width = 99;
 			throw new Error('Expected an error');
 		} catch (err) {
-			assert.equal(err.message, `<Main>: Cannot set read-only property 'width'`);
+			assert.equal(err.message, "<Main>: Cannot set read-only property 'width'");
 		}
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/dev-warning-unknown-props-2/_config.js b/test/runtime/samples/dev-warning-unknown-props-2/_config.js
index 9bff4a2a74..b28724d719 100644
--- a/test/runtime/samples/dev-warning-unknown-props-2/_config.js
+++ b/test/runtime/samples/dev-warning-unknown-props-2/_config.js
@@ -4,6 +4,6 @@ export default {
 	},
 
 	warnings: [
-		`<Foo> was created with unknown prop 'fo'`
+		"<Foo> was created with unknown prop 'fo'"
 	]
 };
diff --git a/test/runtime/samples/dev-warning-unknown-props/_config.js b/test/runtime/samples/dev-warning-unknown-props/_config.js
index 9bff4a2a74..b28724d719 100644
--- a/test/runtime/samples/dev-warning-unknown-props/_config.js
+++ b/test/runtime/samples/dev-warning-unknown-props/_config.js
@@ -4,6 +4,6 @@ export default {
 	},
 
 	warnings: [
-		`<Foo> was created with unknown prop 'fo'`
+		"<Foo> was created with unknown prop 'fo'"
 	]
 };
diff --git a/test/runtime/samples/dynamic-component-nulled-out/_config.js b/test/runtime/samples/dynamic-component-nulled-out/_config.js
index e6ff6032bf..7dc48c82b6 100644
--- a/test/runtime/samples/dynamic-component-nulled-out/_config.js
+++ b/test/runtime/samples/dynamic-component-nulled-out/_config.js
@@ -8,7 +8,7 @@ export default {
 
 		component.Bar = null;
 
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 
 		component.Bar = Bar;
 
diff --git a/test/runtime/samples/dynamic-component-ref/_config.js b/test/runtime/samples/dynamic-component-ref/_config.js
index 6e3cabc435..f64a7fd195 100644
--- a/test/runtime/samples/dynamic-component-ref/_config.js
+++ b/test/runtime/samples/dynamic-component-ref/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `Foo`,
+	html: 'Foo',
 
 	test({ assert, component }) {
 		assert.ok(component.test);
diff --git a/test/runtime/samples/each-block-component-no-props/_config.js b/test/runtime/samples/each-block-component-no-props/_config.js
index e8344496ca..329da68324 100644
--- a/test/runtime/samples/each-block-component-no-props/_config.js
+++ b/test/runtime/samples/each-block-component-no-props/_config.js
@@ -5,12 +5,12 @@ export default {
 
 	async test({ assert, component, target }) {
 		await component.remove();
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 
 		await component.add();
-		assert.htmlEqual(target.innerHTML, `<p>hello</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>hello</p>');
 
 		await component.remove();
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
diff --git a/test/runtime/samples/each-block-containing-component-in-if/_config.js b/test/runtime/samples/each-block-containing-component-in-if/_config.js
index 9083742891..d617d23cd3 100644
--- a/test/runtime/samples/each-block-containing-component-in-if/_config.js
+++ b/test/runtime/samples/each-block-containing-component-in-if/_config.js
@@ -4,7 +4,7 @@ export default {
 		fields: [1, 2]
 	},
 
-	html: `<div></div>`,
+	html: '<div></div>',
 
 	test({ assert, component, target }) {
 		component.show = true;
diff --git a/test/runtime/samples/each-block-else-in-if/_config.js b/test/runtime/samples/each-block-else-in-if/_config.js
index c800ee8a30..24d1e5477a 100644
--- a/test/runtime/samples/each-block-else-in-if/_config.js
+++ b/test/runtime/samples/each-block-else-in-if/_config.js
@@ -6,7 +6,7 @@ export default {
 
 	test({ assert, component, target }) {
 		component.visible = false;
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 
 		component.visible = true;
 		assert.htmlEqual(target.innerHTML, `
diff --git a/test/runtime/samples/each-block-else-mount-or-intro/_config.js b/test/runtime/samples/each-block-else-mount-or-intro/_config.js
index acf2bafd5f..15674ea651 100644
--- a/test/runtime/samples/each-block-else-mount-or-intro/_config.js
+++ b/test/runtime/samples/each-block-else-mount-or-intro/_config.js
@@ -1,4 +1,4 @@
 export default {
 	props: { items: [] },
-	html: `No items.`
+	html: 'No items.'
 };
diff --git a/test/runtime/samples/each-block-empty-outro/_config.js b/test/runtime/samples/each-block-empty-outro/_config.js
index 92eb7c66b1..fe1657aa0c 100644
--- a/test/runtime/samples/each-block-empty-outro/_config.js
+++ b/test/runtime/samples/each-block-empty-outro/_config.js
@@ -13,6 +13,6 @@ export default {
 	test({ assert, component, target }) {
 		component.visible = false;
 
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/each-block-indexed/_config.js b/test/runtime/samples/each-block-indexed/_config.js
index f65c83ca93..bad727bbf1 100644
--- a/test/runtime/samples/each-block-indexed/_config.js
+++ b/test/runtime/samples/each-block-indexed/_config.js
@@ -2,5 +2,5 @@ export default {
 	props: {
 		animals: [ 'adder', 'blue whale', 'chameleon' ]
 	},
-	html: `<p>0: adder</p><p>1: blue whale</p><p>2: chameleon</p><!---->`
+	html: '<p>0: adder</p><p>1: blue whale</p><p>2: chameleon</p><!---->'
 };
diff --git a/test/runtime/samples/each-block-keyed-component-action/_config.js b/test/runtime/samples/each-block-keyed-component-action/_config.js
index 66c609be01..a1afc44c93 100644
--- a/test/runtime/samples/each-block-keyed-component-action/_config.js
+++ b/test/runtime/samples/each-block-keyed-component-action/_config.js
@@ -2,15 +2,15 @@ export default {
 	test({ assert, component, raf }) {
 		assert.equal(component.count, 0);
 
-		component.arr = ["2"];
+		component.arr = ['2'];
 
 		assert.equal(component.count, 1);
 
-		component.arr = ["1", "2"];
+		component.arr = ['1', '2'];
 
 		assert.equal(component.count, 2);
 
-		component.arr = ["2", "1"];
+		component.arr = ['2', '1'];
 
 		assert.equal(component.count, 2);
 
diff --git a/test/runtime/samples/each-block-keyed-dynamic-2/_config.js b/test/runtime/samples/each-block-keyed-dynamic-2/_config.js
index 7eba75a5ff..e25083c751 100644
--- a/test/runtime/samples/each-block-keyed-dynamic-2/_config.js
+++ b/test/runtime/samples/each-block-keyed-dynamic-2/_config.js
@@ -6,9 +6,9 @@ export default {
 	`,
 
 	async test({ assert, component, target, window }) {
-		const button = target.querySelector("button");
+		const button = target.querySelector('button');
 
-		const event = new window.MouseEvent("click");
+		const event = new window.MouseEvent('click');
 		await button.dispatchEvent(event);
 
 		assert.htmlEqual(
diff --git a/test/runtime/samples/each-block-keyed-empty/_config.js b/test/runtime/samples/each-block-keyed-empty/_config.js
index 2c9055ce44..dfa810b3ff 100644
--- a/test/runtime/samples/each-block-keyed-empty/_config.js
+++ b/test/runtime/samples/each-block-keyed-empty/_config.js
@@ -3,5 +3,5 @@ export default {
 		x: [{ z: 1 }, { z: 2 }]
 	},
 
-	html: ``
+	html: ''
 };
diff --git a/test/runtime/samples/each-block-keyed-html/_config.js b/test/runtime/samples/each-block-keyed-html/_config.js
index 536e54543e..3ece052d5c 100644
--- a/test/runtime/samples/each-block-keyed-html/_config.js
+++ b/test/runtime/samples/each-block-keyed-html/_config.js
@@ -5,6 +5,6 @@ export default {
 
 	test({ assert, component, target }) {
 		component.names = component.names.reverse();
-		assert.htmlEqual(target.innerHTML, `JillJohn`);
+		assert.htmlEqual(target.innerHTML, 'JillJohn');
 	}
 };
diff --git a/test/runtime/samples/each-block-keyed-random-permute/_config.js b/test/runtime/samples/each-block-keyed-random-permute/_config.js
index 4e6830a616..88330c4509 100644
--- a/test/runtime/samples/each-block-keyed-random-permute/_config.js
+++ b/test/runtime/samples/each-block-keyed-random-permute/_config.js
@@ -22,7 +22,7 @@ export default {
 		values: toObjects('abc')
 	},
 
-	html: `(a)(b)(c)`,
+	html: '(a)(b)(c)',
 
 	test({ assert, component, target }) {
 		function test(sequence) {
diff --git a/test/runtime/samples/each-block-scope-shadow-bind-2/_config.js b/test/runtime/samples/each-block-scope-shadow-bind-2/_config.js
index 384c2dd2b4..655aac05b7 100644
--- a/test/runtime/samples/each-block-scope-shadow-bind-2/_config.js
+++ b/test/runtime/samples/each-block-scope-shadow-bind-2/_config.js
@@ -8,9 +8,9 @@ export default {
 		<input value="Hello"/>
 	`,
 	async test({ assert, target, window }) {
-		const input = target.querySelector("input");
-		input.value = "abcd";
-		await input.dispatchEvent(new window.Event("input"));
+		const input = target.querySelector('input');
+		input.value = 'abcd';
+		await input.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
diff --git a/test/runtime/samples/each-block-scope-shadow-bind-3/_config.js b/test/runtime/samples/each-block-scope-shadow-bind-3/_config.js
index 92230a735c..42b7a96e34 100644
--- a/test/runtime/samples/each-block-scope-shadow-bind-3/_config.js
+++ b/test/runtime/samples/each-block-scope-shadow-bind-3/_config.js
@@ -25,9 +25,9 @@ export default {
 		</div>
 	`,
 	async test({ assert, target, window }) {
-		const [input1, input2, input3, input4] = target.querySelectorAll("input");
-		input1.value = "Awesome";
-		await input1.dispatchEvent(new window.Event("input"));
+		const [input1, input2, input3, input4] = target.querySelectorAll('input');
+		input1.value = 'Awesome';
+		await input1.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -45,8 +45,8 @@ export default {
       `
 		);
 
-		input2.value = "Svelte";
-		await input2.dispatchEvent(new window.Event("input"));
+		input2.value = 'Svelte';
+		await input2.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -64,8 +64,8 @@ export default {
 			`
 		);
 
-		input3.value = "Foo";
-		await input3.dispatchEvent(new window.Event("input"));
+		input3.value = 'Foo';
+		await input3.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -83,8 +83,8 @@ export default {
 			`
 		);
 
-		input4.value = "Bar";
-		await input4.dispatchEvent(new window.Event("input"));
+		input4.value = 'Bar';
+		await input4.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
diff --git a/test/runtime/samples/each-block-scope-shadow-bind-4/_config.js b/test/runtime/samples/each-block-scope-shadow-bind-4/_config.js
index 418fcbea4a..f0570577b2 100644
--- a/test/runtime/samples/each-block-scope-shadow-bind-4/_config.js
+++ b/test/runtime/samples/each-block-scope-shadow-bind-4/_config.js
@@ -14,11 +14,11 @@ export default {
 		<button>Button</button>
 	`,
 	async test({ assert, target, window }) {
-		const input = target.querySelector("input");
-		const button = target.querySelector("button");
+		const input = target.querySelector('input');
+		const button = target.querySelector('button');
 
-		input.value = "Awesome";
-		await input.dispatchEvent(new window.Event("input"));
+		input.value = 'Awesome';
+		await input.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -32,7 +32,7 @@ export default {
 		);
 
 
-		await button.dispatchEvent(new window.MouseEvent("click"));
+		await button.dispatchEvent(new window.MouseEvent('click'));
 
 		assert.htmlEqual(
 			target.innerHTML,
@@ -47,8 +47,8 @@ export default {
 
 		assert.equal(input.value, 'World');
 
-		input.value = "Svelte";
-		await input.dispatchEvent(new window.Event("input"));
+		input.value = 'Svelte';
+		await input.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
diff --git a/test/runtime/samples/each-block-scope-shadow-bind/_config.js b/test/runtime/samples/each-block-scope-shadow-bind/_config.js
index 384c2dd2b4..655aac05b7 100644
--- a/test/runtime/samples/each-block-scope-shadow-bind/_config.js
+++ b/test/runtime/samples/each-block-scope-shadow-bind/_config.js
@@ -8,9 +8,9 @@ export default {
 		<input value="Hello"/>
 	`,
 	async test({ assert, target, window }) {
-		const input = target.querySelector("input");
-		input.value = "abcd";
-		await input.dispatchEvent(new window.Event("input"));
+		const input = target.querySelector('input');
+		input.value = 'abcd';
+		await input.dispatchEvent(new window.Event('input'));
 
 		assert.htmlEqual(
 			target.innerHTML,
diff --git a/test/runtime/samples/each-block-static/_config.js b/test/runtime/samples/each-block-static/_config.js
index b62d262d9b..fc2fb28cca 100644
--- a/test/runtime/samples/each-block-static/_config.js
+++ b/test/runtime/samples/each-block-static/_config.js
@@ -3,10 +3,10 @@ export default {
 		items: []
 	},
 
-	html: ``,
+	html: '',
 
 	test({ assert, component, target }) {
 		component.items = ['x'];
-		assert.htmlEqual(target.innerHTML, `foo`);
+		assert.htmlEqual(target.innerHTML, 'foo');
 	}
 };
diff --git a/test/runtime/samples/each-blocks-assignment-2/_config.js b/test/runtime/samples/each-blocks-assignment-2/_config.js
index 0831617261..f69b4fe9f6 100644
--- a/test/runtime/samples/each-blocks-assignment-2/_config.js
+++ b/test/runtime/samples/each-blocks-assignment-2/_config.js
@@ -4,9 +4,9 @@ export default {
 		<button>Test</button>
 	`,
 	async test({ assert, component, target, window }) {
-		const button = target.querySelector("button");
+		const button = target.querySelector('button');
 
-		const clickEvent = new window.MouseEvent("click");
+		const clickEvent = new window.MouseEvent('click');
 		await button.dispatchEvent(clickEvent);
 
 		assert.htmlEqual(
diff --git a/test/runtime/samples/each-blocks-assignment/_config.js b/test/runtime/samples/each-blocks-assignment/_config.js
index 2c95d486d6..b651e3e02b 100644
--- a/test/runtime/samples/each-blocks-assignment/_config.js
+++ b/test/runtime/samples/each-blocks-assignment/_config.js
@@ -9,9 +9,9 @@ export default {
 	<button>Test</button>
 	`,
 	async test({ assert, component, target, window }) {
-		let [incrementBtn, ...buttons] = target.querySelectorAll("button");
+		let [incrementBtn, ...buttons] = target.querySelectorAll('button');
 
-		const clickEvent = new window.MouseEvent("click");
+		const clickEvent = new window.MouseEvent('click');
 		await buttons[0].dispatchEvent(clickEvent);
 
 		assert.htmlEqual(
@@ -75,7 +75,7 @@ export default {
 		`
 		);
 
-		[incrementBtn, ...buttons] = target.querySelectorAll("button");
+		[incrementBtn, ...buttons] = target.querySelectorAll('button');
 
 		await buttons[3].dispatchEvent(clickEvent);
 
diff --git a/test/runtime/samples/each-blocks-expression/_config.js b/test/runtime/samples/each-blocks-expression/_config.js
index 239a18b6dc..9f14bd81ec 100644
--- a/test/runtime/samples/each-blocks-expression/_config.js
+++ b/test/runtime/samples/each-blocks-expression/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>a</p><p>b</p><p>c</p><!---->`
+	html: '<p>a</p><p>b</p><p>c</p><!---->'
 };
diff --git a/test/runtime/samples/each-blocks-nested-b/_config.js b/test/runtime/samples/each-blocks-nested-b/_config.js
index c44899e6fb..7b13d988b4 100644
--- a/test/runtime/samples/each-blocks-nested-b/_config.js
+++ b/test/runtime/samples/each-blocks-nested-b/_config.js
@@ -28,7 +28,7 @@ export default {
 			}
 		]
 	},
-	html: `<p>animals: aardvark</p><p>animals: buffalo</p><p>animals: chinchilla</p><!----><p>countries: albania</p><p>countries: brazil</p><p>countries: china</p><!----><p>people: alice</p><p>people: bob</p><p>people: carol</p><p>people: dave</p><!----><!---->`,
+	html: '<p>animals: aardvark</p><p>animals: buffalo</p><p>animals: chinchilla</p><!----><p>countries: albania</p><p>countries: brazil</p><p>countries: china</p><!----><p>people: alice</p><p>people: bob</p><p>people: carol</p><p>people: dave</p><!----><!---->',
 	test({ assert, component, target }) {
 		// TODO
 	}
diff --git a/test/runtime/samples/each-blocks-nested/_config.js b/test/runtime/samples/each-blocks-nested/_config.js
index 790ec9ced7..3318bc344d 100644
--- a/test/runtime/samples/each-blocks-nested/_config.js
+++ b/test/runtime/samples/each-blocks-nested/_config.js
@@ -4,7 +4,7 @@ export default {
 		rows: [ 1, 2, 3 ]
 	},
 
-	html: `<div>a, 1</div><div>a, 2</div><div>a, 3</div><!----><div>b, 1</div><div>b, 2</div><div>b, 3</div><!----><div>c, 1</div><div>c, 2</div><div>c, 3</div><!----><!---->`,
+	html: '<div>a, 1</div><div>a, 2</div><div>a, 3</div><!----><div>b, 1</div><div>b, 2</div><div>b, 3</div><!----><div>c, 1</div><div>c, 2</div><div>c, 3</div><!----><!---->',
 
 	test({ assert, component, target }) {
 		// TODO
diff --git a/test/runtime/samples/event-handler-dynamic-expression/_config.js b/test/runtime/samples/event-handler-dynamic-expression/_config.js
index b202196ebf..f479c9cef2 100644
--- a/test/runtime/samples/event-handler-dynamic-expression/_config.js
+++ b/test/runtime/samples/event-handler-dynamic-expression/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<button>bar</button>`,
+	html: '<button>bar</button>',
 
 	async test({ assert, component, target, window }) {
 		const [button] = target.querySelectorAll(
@@ -9,12 +9,12 @@ export default {
 		const event = new window.MouseEvent('click');
 
 		await button.dispatchEvent(event);
-		assert.htmlEqual(target.innerHTML, `<button>foo</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>foo</button>');
 		
 		await button.dispatchEvent(event);
-		assert.htmlEqual(target.innerHTML, `<button>bar</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>bar</button>');
 		
 		await button.dispatchEvent(event);
-		assert.htmlEqual(target.innerHTML, `<button>foo</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>foo</button>');
 	}
 };
diff --git a/test/runtime/samples/event-handler-dynamic-hash/_config.js b/test/runtime/samples/event-handler-dynamic-hash/_config.js
index dcfebb7008..35f5fa103d 100644
--- a/test/runtime/samples/event-handler-dynamic-hash/_config.js
+++ b/test/runtime/samples/event-handler-dynamic-hash/_config.js
@@ -14,14 +14,14 @@ export default {
 		);
 
 		const event = new window.MouseEvent('click');
-		let err = "";
+		let err = '';
 		window.addEventListener('error', (e) => {
 			e.preventDefault();
 			err = e.message;
 		});
 
 		await button.dispatchEvent(event);
-		assert.equal(err, "", err);
+		assert.equal(err, '', err);
 		assert.htmlEqual(target.innerHTML, `
 			<p>
 				<button>set handler 1</button>
diff --git a/test/runtime/samples/event-handler-dynamic-invalid/_config.js b/test/runtime/samples/event-handler-dynamic-invalid/_config.js
index ad9d8c8680..0ed298c95a 100644
--- a/test/runtime/samples/event-handler-dynamic-invalid/_config.js
+++ b/test/runtime/samples/event-handler-dynamic-invalid/_config.js
@@ -9,7 +9,7 @@ export default {
 		);
 
 		const event = new window.MouseEvent('click');
-		let err = "";
+		let err = '';
 		window.addEventListener('error', (e) => {
 			e.preventDefault();
 			err = e.message;
@@ -17,12 +17,12 @@ export default {
 
 		// All three should not throw if proper checking is done in runtime code
 		await buttonUndef.dispatchEvent(event);
-		assert.equal(err, "", err);
+		assert.equal(err, '', err);
 
 		await buttonNull.dispatchEvent(event);
-		assert.equal(err, "", err);
+		assert.equal(err, '', err);
 
 		await buttonInvalid.dispatchEvent(event);
-		assert.equal(err, "", err);
+		assert.equal(err, '', err);
 	}
 };
diff --git a/test/runtime/samples/event-handler-dynamic/_config.js b/test/runtime/samples/event-handler-dynamic/_config.js
index dcfebb7008..35f5fa103d 100644
--- a/test/runtime/samples/event-handler-dynamic/_config.js
+++ b/test/runtime/samples/event-handler-dynamic/_config.js
@@ -14,14 +14,14 @@ export default {
 		);
 
 		const event = new window.MouseEvent('click');
-		let err = "";
+		let err = '';
 		window.addEventListener('error', (e) => {
 			e.preventDefault();
 			err = e.message;
 		});
 
 		await button.dispatchEvent(event);
-		assert.equal(err, "", err);
+		assert.equal(err, '', err);
 		assert.htmlEqual(target.innerHTML, `
 			<p>
 				<button>set handler 1</button>
diff --git a/test/runtime/samples/event-handler-each-modifier/_config.js b/test/runtime/samples/event-handler-each-modifier/_config.js
index 702addd3c3..8274e22eec 100644
--- a/test/runtime/samples/event-handler-each-modifier/_config.js
+++ b/test/runtime/samples/event-handler-each-modifier/_config.js
@@ -2,21 +2,21 @@ export default {
 	async test({ assert, component, target, window }) {
 		// set first
 		await component.lists.update(() => [
-			{ text: "item1" },
-			{ text: "item2" },
-			{ text: "item3" }
+			{ text: 'item1' },
+			{ text: 'item2' },
+			{ text: 'item3' }
 		]);
 
 		await component.lists.update(() => [
-			{ text: "item3" },
-			{ text: "item2" },
-			{ text: "item1" }
+			{ text: 'item3' },
+			{ text: 'item2' },
+			{ text: 'item1' }
 		]);
 
 		await component.lists.update(() => [
-			{ text: "item1" },
-			{ text: "item2" },
-			{ text: "item3" }
+			{ text: 'item1' },
+			{ text: 'item2' },
+			{ text: 'item3' }
 		]);
 
 		assert.equal(component.updated, 4);
diff --git a/test/runtime/samples/fragment-trailing-whitespace/_config.js b/test/runtime/samples/fragment-trailing-whitespace/_config.js
index 2251d6dae8..549cb1be68 100644
--- a/test/runtime/samples/fragment-trailing-whitespace/_config.js
+++ b/test/runtime/samples/fragment-trailing-whitespace/_config.js
@@ -1,5 +1,5 @@
-const message = "the quick brown fox jumps over the lazy dog";
-const expected = [...message].map(c => `<span>${c + " "}</span>`).join("");
+const message = 'the quick brown fox jumps over the lazy dog';
+const expected = [...message].map(c => `<span>${c + ' '}</span>`).join('');
 
 export default {
 	props: {
diff --git a/test/runtime/samples/function-in-expression/_config.js b/test/runtime/samples/function-in-expression/_config.js
index f8ddbe26a5..6b6fb29895 100644
--- a/test/runtime/samples/function-in-expression/_config.js
+++ b/test/runtime/samples/function-in-expression/_config.js
@@ -8,6 +8,6 @@ export default {
 	test({ assert, component, target }) {
 		component.numbers = [10, 11, 12, 13, 14, 15, 16];
 
-		assert.htmlEqual(target.innerHTML, `11, 13, 15`);
+		assert.htmlEqual(target.innerHTML, '11, 13, 15');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/get-after-destroy/_config.js b/test/runtime/samples/get-after-destroy/_config.js
index 5d10bbe72a..5e3171d39a 100644
--- a/test/runtime/samples/get-after-destroy/_config.js
+++ b/test/runtime/samples/get-after-destroy/_config.js
@@ -3,7 +3,7 @@ export default {
 		foo: 1
 	},
 
-	html: `<div>1</div>`,
+	html: '<div>1</div>',
 
 	test({ assert, component }) {
 		component.$destroy();
diff --git a/test/runtime/samples/if-block-compound-outro-no-dependencies/_config.js b/test/runtime/samples/if-block-compound-outro-no-dependencies/_config.js
index 58b0521022..bcc4e256a4 100644
--- a/test/runtime/samples/if-block-compound-outro-no-dependencies/_config.js
+++ b/test/runtime/samples/if-block-compound-outro-no-dependencies/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `blah blah blah blah`
+	html: 'blah blah blah blah'
 };
diff --git a/test/runtime/samples/if-block-conservative-update/_config.js b/test/runtime/samples/if-block-conservative-update/_config.js
index a71166ef81..9be7e29fef 100644
--- a/test/runtime/samples/if-block-conservative-update/_config.js
+++ b/test/runtime/samples/if-block-conservative-update/_config.js
@@ -9,7 +9,7 @@ export default {
 		}
 	},
 
-	html: `<p>potato</p>`,
+	html: '<p>potato</p>',
 
 	test({ assert, component, target }) {
 		assert.equal(count, 1);
@@ -17,6 +17,6 @@ export default {
 		component.foo = 'soup';
 		assert.equal(count, 1);
 
-		assert.htmlEqual(target.innerHTML, `<p>soup</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>soup</p>');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/if-block-else-conservative-update/_config.js b/test/runtime/samples/if-block-else-conservative-update/_config.js
index 5c90d2ad3a..bb6cfef05f 100644
--- a/test/runtime/samples/if-block-else-conservative-update/_config.js
+++ b/test/runtime/samples/if-block-else-conservative-update/_config.js
@@ -15,7 +15,7 @@ export default {
 		}
 	},
 
-	html: `<p>potato</p>`,
+	html: '<p>potato</p>',
 
 	test({ assert, component, target }) {
 		assert.equal(count_a, 1);
@@ -26,12 +26,12 @@ export default {
 		assert.equal(count_a, 2);
 		assert.equal(count_b, 1);
 
-		assert.htmlEqual(target.innerHTML, `<p>SOUP</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>SOUP</p>');
 
 		component.foo = 'salad';
 		assert.equal(count_a, 3);
 		assert.equal(count_b, 1);
 
-		assert.htmlEqual(target.innerHTML, `<p>SALAD</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>SALAD</p>');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/if-block-elseif-no-else/_config.js b/test/runtime/samples/if-block-elseif-no-else/_config.js
index ec3379737a..e9696e513c 100644
--- a/test/runtime/samples/if-block-elseif-no-else/_config.js
+++ b/test/runtime/samples/if-block-elseif-no-else/_config.js
@@ -14,6 +14,6 @@ export default {
 		`);
 
 		component.x = 6;
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
diff --git a/test/runtime/samples/immutable-option/_config.js b/test/runtime/samples/immutable-option/_config.js
index 1224d0213a..4962d2d3b7 100644
--- a/test/runtime/samples/immutable-option/_config.js
+++ b/test/runtime/samples/immutable-option/_config.js
@@ -1,11 +1,11 @@
 export default {
 	immutable: true,
 
-	html: `<div><h3>Called 1 times.</h3></div>`,
+	html: '<div><h3>Called 1 times.</h3></div>',
 
 	test({ assert, component, target }) {
 		// eslint-disable-next-line no-self-assign
 		component.foo = component.foo;
-		assert.htmlEqual(target.innerHTML, `<div><h3>Called 1 times.</h3></div>`);
+		assert.htmlEqual(target.innerHTML, '<div><h3>Called 1 times.</h3></div>');
 	}
 };
diff --git a/test/runtime/samples/immutable-svelte-meta-false/_config.js b/test/runtime/samples/immutable-svelte-meta-false/_config.js
index 664f99f087..1506e79227 100644
--- a/test/runtime/samples/immutable-svelte-meta-false/_config.js
+++ b/test/runtime/samples/immutable-svelte-meta-false/_config.js
@@ -1,11 +1,11 @@
 export default {
 	immutable: true,
 
-	html: `<div><h3>Called 1 times.</h3></div>`,
+	html: '<div><h3>Called 1 times.</h3></div>',
 
 	test({ assert, component, target }) {
 		// eslint-disable-next-line no-self-assign
 		component.foo = component.foo;
-		assert.htmlEqual(target.innerHTML, `<div><h3>Called 2 times.</h3></div>`);
+		assert.htmlEqual(target.innerHTML, '<div><h3>Called 2 times.</h3></div>');
 	}
 };
diff --git a/test/runtime/samples/immutable-svelte-meta/_config.js b/test/runtime/samples/immutable-svelte-meta/_config.js
index 4e39f36224..2dfb6cd3db 100644
--- a/test/runtime/samples/immutable-svelte-meta/_config.js
+++ b/test/runtime/samples/immutable-svelte-meta/_config.js
@@ -1,9 +1,9 @@
 export default {
-	html: `<div><h3>Called 1 times.</h3></div>`,
+	html: '<div><h3>Called 1 times.</h3></div>',
 
 	test({ assert, component, target }) {
 		// eslint-disable-next-line no-self-assign
 		component.foo = component.foo;
-		assert.htmlEqual(target.innerHTML, `<div><h3>Called 1 times.</h3></div>`);
+		assert.htmlEqual(target.innerHTML, '<div><h3>Called 1 times.</h3></div>');
 	}
 };
diff --git a/test/runtime/samples/imported-renamed-components/_config.js b/test/runtime/samples/imported-renamed-components/_config.js
index 9a9e325b84..07683b05be 100644
--- a/test/runtime/samples/imported-renamed-components/_config.js
+++ b/test/runtime/samples/imported-renamed-components/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `OneTwo`
+	html: 'OneTwo'
 };
diff --git a/test/runtime/samples/instrumentation-auto-subscription-self-assignment/_config.js b/test/runtime/samples/instrumentation-auto-subscription-self-assignment/_config.js
index f70a80fe44..450562bebe 100644
--- a/test/runtime/samples/instrumentation-auto-subscription-self-assignment/_config.js
+++ b/test/runtime/samples/instrumentation-auto-subscription-self-assignment/_config.js
@@ -1,8 +1,8 @@
 export default {
-	html: `[]`,
+	html: '[]',
 
 	async test({ assert, component, target }) {
 		await component.go();
-		assert.htmlEqual(target.innerHTML, `[42]`);
+		assert.htmlEqual(target.innerHTML, '[42]');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/invalidation-in-if-condition/_config.js b/test/runtime/samples/invalidation-in-if-condition/_config.js
index 27209c75c9..c9b551c918 100644
--- a/test/runtime/samples/invalidation-in-if-condition/_config.js
+++ b/test/runtime/samples/invalidation-in-if-condition/_config.js
@@ -1,17 +1,17 @@
 export default {
-	html: `<button>false 0</button>`,
+	html: '<button>false 0</button>',
 
 	async test({ assert, target, window }) {
 		const button = target.querySelector('button');
 		const click = new window.MouseEvent('click');
 
 		await button.dispatchEvent(click);
-		assert.htmlEqual(target.innerHTML, `<button>true 1</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>true 1</button>');
 
 		await button.dispatchEvent(click);
-		assert.htmlEqual(target.innerHTML, `<button>false 1</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>false 1</button>');
 
 		await button.dispatchEvent(click);
-		assert.htmlEqual(target.innerHTML, `<button>true 2</button>`);
+		assert.htmlEqual(target.innerHTML, '<button>true 2</button>');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/key-block-2/_config.js b/test/runtime/samples/key-block-2/_config.js
index a7c53bd91f..9bbf1f199f 100644
--- a/test/runtime/samples/key-block-2/_config.js
+++ b/test/runtime/samples/key-block-2/_config.js
@@ -1,14 +1,14 @@
 // with reactive content beside `key`
 export default {
-	html: `<div>00</div>`,
+	html: '<div>00</div>',
 	async test({ assert, component, target, window }) {
 		const div = target.querySelector('div');
 		component.reactive = 2;
-		assert.htmlEqual(target.innerHTML, `<div>02</div>`);
+		assert.htmlEqual(target.innerHTML, '<div>02</div>');
 		assert.strictEqual(div, target.querySelector('div'));
 
 		component.value = 5;
-		assert.htmlEqual(target.innerHTML, `<div>52</div>`);
+		assert.htmlEqual(target.innerHTML, '<div>52</div>');
 		assert.notStrictEqual(div, target.querySelector('div'));
 	}
 };
diff --git a/test/runtime/samples/key-block-3/_config.js b/test/runtime/samples/key-block-3/_config.js
index 4290599cb3..17b6146827 100644
--- a/test/runtime/samples/key-block-3/_config.js
+++ b/test/runtime/samples/key-block-3/_config.js
@@ -1,11 +1,11 @@
 // key is not used in the template
 export default {
-	html: `<div></div>`,
+	html: '<div></div>',
 	async test({ assert, component, target, window }) {
 		const div = target.querySelector('div');
 
 		component.value = 5;
-		assert.htmlEqual(target.innerHTML, `<div></div>`);
+		assert.htmlEqual(target.innerHTML, '<div></div>');
 		assert.notStrictEqual(div, target.querySelector('div'));
 	}
 };
diff --git a/test/runtime/samples/key-block-array-immutable/_config.js b/test/runtime/samples/key-block-array-immutable/_config.js
index fb94556c0f..b1ffd6cd15 100644
--- a/test/runtime/samples/key-block-array-immutable/_config.js
+++ b/test/runtime/samples/key-block-array-immutable/_config.js
@@ -1,15 +1,15 @@
 export default {
-	html: `<div>1</div>`,
+	html: '<div>1</div>',
 	async test({ assert, component, target, window }) {
-		let div = target.querySelector("div");
+		let div = target.querySelector('div');
 		await component.append(2);
-		assert.htmlEqual(target.innerHTML, `<div>1</div>`);
-		assert.strictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>1</div>');
+		assert.strictEqual(div, target.querySelector('div'));
 
-		div = target.querySelector("div");
+		div = target.querySelector('div');
 
 		component.array = [3, 4];
-		assert.htmlEqual(target.innerHTML, `<div>3,4</div>`);
-		assert.notStrictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>3,4</div>');
+		assert.notStrictEqual(div, target.querySelector('div'));
 	}
 };
diff --git a/test/runtime/samples/key-block-array/_config.js b/test/runtime/samples/key-block-array/_config.js
index 05d5fe9995..374175177d 100644
--- a/test/runtime/samples/key-block-array/_config.js
+++ b/test/runtime/samples/key-block-array/_config.js
@@ -1,15 +1,15 @@
 export default {
-	html: `<div>1</div>`,
+	html: '<div>1</div>',
 	async test({ assert, component, target, window }) {
-		let div = target.querySelector("div");
+		let div = target.querySelector('div');
 		await component.append(2);
-		assert.htmlEqual(target.innerHTML, `<div>1,2</div>`);
-		assert.notStrictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>1,2</div>');
+		assert.notStrictEqual(div, target.querySelector('div'));
 
-		div = target.querySelector("div");
+		div = target.querySelector('div');
 
 		component.array = [3, 4];
-		assert.htmlEqual(target.innerHTML, `<div>3,4</div>`);
-		assert.notStrictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>3,4</div>');
+		assert.notStrictEqual(div, target.querySelector('div'));
 	}
 };
diff --git a/test/runtime/samples/key-block-expression-2/_config.js b/test/runtime/samples/key-block-expression-2/_config.js
index 236c72fa3d..bab23d2a84 100644
--- a/test/runtime/samples/key-block-expression-2/_config.js
+++ b/test/runtime/samples/key-block-expression-2/_config.js
@@ -1,18 +1,18 @@
 export default {
-	html: `<div>3</div>`,
+	html: '<div>3</div>',
 	async test({ assert, component, target, window }) {
-		const div = target.querySelector("div");
+		const div = target.querySelector('div');
 
 		await component.mutate();
-		assert.htmlEqual(target.innerHTML, `<div>5</div>`);
-		assert.strictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>5</div>');
+		assert.strictEqual(div, target.querySelector('div'));
 
 		await component.reassign();
-		assert.htmlEqual(target.innerHTML, `<div>7</div>`);
-		assert.strictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>7</div>');
+		assert.strictEqual(div, target.querySelector('div'));
 
 		await component.changeKey();
-		assert.htmlEqual(target.innerHTML, `<div>7</div>`);
-		assert.notStrictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>7</div>');
+		assert.notStrictEqual(div, target.querySelector('div'));
 	}
 };
diff --git a/test/runtime/samples/key-block-expression/_config.js b/test/runtime/samples/key-block-expression/_config.js
index 78890988ea..c04d55bd29 100644
--- a/test/runtime/samples/key-block-expression/_config.js
+++ b/test/runtime/samples/key-block-expression/_config.js
@@ -1,28 +1,28 @@
 export default {
-	html: `<div>000</div>`,
+	html: '<div>000</div>',
 	async test({ assert, component, target, window }) {
-		let div = target.querySelector("div");
+		let div = target.querySelector('div');
 		component.value = 2;
-		assert.htmlEqual(target.innerHTML, `<div>200</div>`);
-		assert.notStrictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>200</div>');
+		assert.notStrictEqual(div, target.querySelector('div'));
 
-		div = target.querySelector("div");
+		div = target.querySelector('div');
 
 		component.anotherValue = 5;
-		assert.htmlEqual(target.innerHTML, `<div>250</div>`);
-		assert.notStrictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>250</div>');
+		assert.notStrictEqual(div, target.querySelector('div'));
 
-		div = target.querySelector("div");
+		div = target.querySelector('div');
 
 		component.thirdValue = 9;
-		assert.htmlEqual(target.innerHTML, `<div>259</div>`);
-		assert.strictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>259</div>');
+		assert.strictEqual(div, target.querySelector('div'));
 
 		// make dirty while maintain the value of `value + anotherValue`
 		// should update the content, but not recreate the elements
 		await component.$set({ value: 4, anotherValue: 3 });
 
-		assert.htmlEqual(target.innerHTML, `<div>439</div>`);
-		assert.strictEqual(div, target.querySelector("div"));
+		assert.htmlEqual(target.innerHTML, '<div>439</div>');
+		assert.strictEqual(div, target.querySelector('div'));
 	}
 };
diff --git a/test/runtime/samples/key-block-static/_config.js b/test/runtime/samples/key-block-static/_config.js
index d5ea0bf687..8323336615 100644
--- a/test/runtime/samples/key-block-static/_config.js
+++ b/test/runtime/samples/key-block-static/_config.js
@@ -1,9 +1,9 @@
 export default {
-	html: `<div>00</div>`,
+	html: '<div>00</div>',
 	async test({ assert, component, target, window }) {
 		const div = target.querySelector('div');
 		component.anotherValue = 2;
-		assert.htmlEqual(target.innerHTML, `<div>02</div>`);
+		assert.htmlEqual(target.innerHTML, '<div>02</div>');
 		assert.strictEqual(div, target.querySelector('div'));
 	}
 };
diff --git a/test/runtime/samples/key-block/_config.js b/test/runtime/samples/key-block/_config.js
index ad206c3b06..b25ca901f8 100644
--- a/test/runtime/samples/key-block/_config.js
+++ b/test/runtime/samples/key-block/_config.js
@@ -1,16 +1,16 @@
 export default {
-	html: `<div>0</div><div>0</div>`,
+	html: '<div>0</div><div>0</div>',
 	async test({ assert, component, target, window }) {
 		let [div1, div2] = target.querySelectorAll('div');
 
 		component.value = 5;
-		assert.htmlEqual(target.innerHTML, `<div>5</div><div>0</div>`);
+		assert.htmlEqual(target.innerHTML, '<div>5</div><div>0</div>');
 		assert.notStrictEqual(div1, target.querySelectorAll('div')[0]);
 		assert.strictEqual(div2, target.querySelectorAll('div')[1]);
 		[div1, div2] = target.querySelectorAll('div');
 		
 		component.reactive = 10;
-		assert.htmlEqual(target.innerHTML, `<div>5</div><div>10</div>`);
+		assert.htmlEqual(target.innerHTML, '<div>5</div><div>10</div>');
 		assert.strictEqual(div1, target.querySelectorAll('div')[0]);
 		assert.strictEqual(div2, target.querySelectorAll('div')[1]);
 	}
diff --git a/test/runtime/samples/keyed-each-dev-unique/_config.js b/test/runtime/samples/keyed-each-dev-unique/_config.js
index 8f46af9d52..81728d9c15 100644
--- a/test/runtime/samples/keyed-each-dev-unique/_config.js
+++ b/test/runtime/samples/keyed-each-dev-unique/_config.js
@@ -3,5 +3,5 @@ export default {
 		dev: true
 	},
 
-	error: `Cannot have duplicate keys in a keyed each`
+	error: 'Cannot have duplicate keys in a keyed each'
 };
diff --git a/test/runtime/samples/module-context-export/_config.js b/test/runtime/samples/module-context-export/_config.js
index 902501fdd4..4d77becea9 100644
--- a/test/runtime/samples/module-context-export/_config.js
+++ b/test/runtime/samples/module-context-export/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>(42)(99)</p>`
+	html: '<p>(42)(99)</p>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/module-context-with-instance-script/_config.js b/test/runtime/samples/module-context-with-instance-script/_config.js
index 902501fdd4..4d77becea9 100644
--- a/test/runtime/samples/module-context-with-instance-script/_config.js
+++ b/test/runtime/samples/module-context-with-instance-script/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>(42)(99)</p>`
+	html: '<p>(42)(99)</p>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/module-context/_config.js b/test/runtime/samples/module-context/_config.js
index 0ea26ee446..947138e795 100644
--- a/test/runtime/samples/module-context/_config.js
+++ b/test/runtime/samples/module-context/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>42</p>`
+	html: '<p>42</p>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/names-deconflicted/_config.js b/test/runtime/samples/names-deconflicted/_config.js
index 07b337a1e8..9ce1010690 100644
--- a/test/runtime/samples/names-deconflicted/_config.js
+++ b/test/runtime/samples/names-deconflicted/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<p>1: foo</p><p>2: bar</p><p>3: baz</p>`,
+	html: '<p>1: foo</p><p>2: bar</p><p>3: baz</p>',
 
 	test({ assert, component, target }) {
 		component.widgets = [
@@ -7,6 +7,6 @@ export default {
 			{ name: 'bosh' }
 		];
 
-		assert.htmlEqual( target.innerHTML, `<p>1: bish</p><p>2: bosh</p>` );
+		assert.htmlEqual( target.innerHTML, '<p>1: bish</p><p>2: bosh</p>' );
 	}
 };
diff --git a/test/runtime/samples/nbsp/_config.js b/test/runtime/samples/nbsp/_config.js
index 6322725f98..f5636bfebd 100644
--- a/test/runtime/samples/nbsp/_config.js
+++ b/test/runtime/samples/nbsp/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<span>&nbsp;</span>`,
+	html: '<span>&nbsp;</span>',
 
 	test({ assert, component, target }) {
 		const text = target.querySelector( 'span' ).textContent;
diff --git a/test/runtime/samples/nested-transition-detach-each/_config.js b/test/runtime/samples/nested-transition-detach-each/_config.js
index 00c2d44048..41d32e597c 100644
--- a/test/runtime/samples/nested-transition-detach-each/_config.js
+++ b/test/runtime/samples/nested-transition-detach-each/_config.js
@@ -5,7 +5,7 @@ export default {
 		cols: ['a', 'b', 'c']
 	},
 
-	html: ``,
+	html: '',
 
 	compileOptions: {
 		dev: true
@@ -34,6 +34,6 @@ export default {
 		component.visible = false;
 		raf.tick(0);
 		raf.tick(100);
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
diff --git a/test/runtime/samples/numeric-seperator/_config.js b/test/runtime/samples/numeric-seperator/_config.js
index bc6d7c04f3..2b1b5168ee 100644
--- a/test/runtime/samples/numeric-seperator/_config.js
+++ b/test/runtime/samples/numeric-seperator/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `2048 2048`
+	html: '2048 2048'
 };
diff --git a/test/runtime/samples/observable-auto-subscribe/_config.js b/test/runtime/samples/observable-auto-subscribe/_config.js
index 289a3b51c6..b5b1e8b974 100644
--- a/test/runtime/samples/observable-auto-subscribe/_config.js
+++ b/test/runtime/samples/observable-auto-subscribe/_config.js
@@ -23,7 +23,7 @@ export default {
 		visible: false
 	},
 
-	html: ``,
+	html: '',
 
 	async test({ assert, component, target }) {
 		assert.equal(subscribers.length, 0);
diff --git a/test/runtime/samples/onmount-fires-when-ready-nested/_config.js b/test/runtime/samples/onmount-fires-when-ready-nested/_config.js
index b7446c1d72..4f7ec9b051 100644
--- a/test/runtime/samples/onmount-fires-when-ready-nested/_config.js
+++ b/test/runtime/samples/onmount-fires-when-ready-nested/_config.js
@@ -1,5 +1,5 @@
 export default {
 	skip_if_ssr: true, // uses oncreate
 
-	html: `<div><p>true</p>\n<p>true</p></div>`
+	html: '<div><p>true</p>\n<p>true</p></div>'
 };
diff --git a/test/runtime/samples/onmount-fires-when-ready/_config.js b/test/runtime/samples/onmount-fires-when-ready/_config.js
index de095cbdb7..ca9f535c19 100644
--- a/test/runtime/samples/onmount-fires-when-ready/_config.js
+++ b/test/runtime/samples/onmount-fires-when-ready/_config.js
@@ -1,10 +1,10 @@
 export default {
 	skip_if_ssr: true, // uses oncreate
 
-	html: `<div><p>true</p></div>`,
+	html: '<div><p>true</p></div>',
 
 	test({ assert, component, target }) {
 		component.foo = true;
-		assert.htmlEqual(target.innerHTML, `<div><p>true</p>\n<p>true</p></div>`);
+		assert.htmlEqual(target.innerHTML, '<div><p>true</p>\n<p>true</p></div>');
 	}
 };
diff --git a/test/runtime/samples/onmount-get-current-component/_config.js b/test/runtime/samples/onmount-get-current-component/_config.js
index 8f9529de5c..6c5c666cf0 100644
--- a/test/runtime/samples/onmount-get-current-component/_config.js
+++ b/test/runtime/samples/onmount-get-current-component/_config.js
@@ -1,4 +1,4 @@
 export default {
 	skip_if_ssr: true,
-	html: `1`
+	html: '1'
 };
diff --git a/test/runtime/samples/option-without-select/_config.js b/test/runtime/samples/option-without-select/_config.js
index 48303961ad..75d4d6583f 100644
--- a/test/runtime/samples/option-without-select/_config.js
+++ b/test/runtime/samples/option-without-select/_config.js
@@ -3,7 +3,7 @@ export default {
 		foo: 'hello'
 	},
 
-	html: `<option value='hello'>hello</option>`,
+	html: "<option value='hello'>hello</option>",
 
 	test({ assert, component, target }) {
 		component.foo = 'goodbye';
diff --git a/test/runtime/samples/prop-quoted/_config.js b/test/runtime/samples/prop-quoted/_config.js
index d982bc87cc..e3e553ded8 100644
--- a/test/runtime/samples/prop-quoted/_config.js
+++ b/test/runtime/samples/prop-quoted/_config.js
@@ -3,10 +3,10 @@ export default {
 		foo: 1
 	},
 
-	html: `1`,
+	html: '1',
 
 	async test({ assert, component, target }) {
 		component.foo = 2;
-		assert.htmlEqual(target.innerHTML, `2`);
+		assert.htmlEqual(target.innerHTML, '2');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/prop-without-semicolon-b/_config.js b/test/runtime/samples/prop-without-semicolon-b/_config.js
index 7104dc2b2d..3ded1a72d8 100644
--- a/test/runtime/samples/prop-without-semicolon-b/_config.js
+++ b/test/runtime/samples/prop-without-semicolon-b/_config.js
@@ -3,5 +3,5 @@ export default {
 		name: 'world'
 	},
 
-	html: `<h1>Hello world!</h1>`
+	html: '<h1>Hello world!</h1>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/prop-without-semicolon/_config.js b/test/runtime/samples/prop-without-semicolon/_config.js
index 328d6cc2eb..0655d02a2c 100644
--- a/test/runtime/samples/prop-without-semicolon/_config.js
+++ b/test/runtime/samples/prop-without-semicolon/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<h1>Hello world!</h1>`
+	html: '<h1>Hello world!</h1>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/props-reactive-only-with-change/_config.js b/test/runtime/samples/props-reactive-only-with-change/_config.js
index d2e86e583d..dcf12868f9 100644
--- a/test/runtime/samples/props-reactive-only-with-change/_config.js
+++ b/test/runtime/samples/props-reactive-only-with-change/_config.js
@@ -3,8 +3,8 @@ let callbacks = [];
 export default {
 	props: {
 		callback: (value) => callbacks.push(value),
-		val1: "1",
-		val2: "2"
+		val1: '1',
+		val2: '2'
 	},
 
 	before_test() {
@@ -15,15 +15,15 @@ export default {
 		assert.equal(callbacks.length, 2);
 		assert.equal(JSON.stringify(callbacks), '["1","2"]');
 
-		component.val1 = "3";
+		component.val1 = '3';
 		assert.equal(callbacks.length, 3);
 		assert.equal(JSON.stringify(callbacks), '["1","2","1"]');
 
-		component.val1 = "4";
+		component.val1 = '4';
 		assert.equal(callbacks.length, 4);
 		assert.equal(JSON.stringify(callbacks), '["1","2","1","1"]');
 
-		component.val2 = "5";
+		component.val2 = '5';
 		assert.equal(callbacks.length, 5);
 		assert.equal(JSON.stringify(callbacks), '["1","2","1","1","2"]');
 	}
diff --git a/test/runtime/samples/props-reactive-slot/_config.js b/test/runtime/samples/props-reactive-slot/_config.js
index 8ee6ef69dc..266f0fc8a8 100644
--- a/test/runtime/samples/props-reactive-slot/_config.js
+++ b/test/runtime/samples/props-reactive-slot/_config.js
@@ -5,8 +5,8 @@ export default {
 	`,
 
 	async test({ assert, component, target, window }) {
-		const btn = target.querySelector("button");
-		const clickEvent = new window.MouseEvent("click");
+		const btn = target.querySelector('button');
+		const clickEvent = new window.MouseEvent('click');
 
 		await btn.dispatchEvent(clickEvent);
 
diff --git a/test/runtime/samples/raw-anchor-first-child/_config.js b/test/runtime/samples/raw-anchor-first-child/_config.js
index 32f948bcbb..02297675c5 100644
--- a/test/runtime/samples/raw-anchor-first-child/_config.js
+++ b/test/runtime/samples/raw-anchor-first-child/_config.js
@@ -1,12 +1,12 @@
 export default {
 	props: {
-		raw: `<span>foo</span>`
+		raw: '<span>foo</span>'
 	},
 
 	test({ assert, component, target }) {
 		const span = target.querySelector('span');
 		assert.ok(!span.previousSibling);
 
-		component.raw = `<span>bar</span>`;
+		component.raw = '<span>bar</span>';
 	}
 };
diff --git a/test/runtime/samples/raw-anchor-first-last-child/_config.js b/test/runtime/samples/raw-anchor-first-last-child/_config.js
index 31f8c343ed..30acfe4d0f 100644
--- a/test/runtime/samples/raw-anchor-first-last-child/_config.js
+++ b/test/runtime/samples/raw-anchor-first-last-child/_config.js
@@ -1,6 +1,6 @@
 export default {
 	props: {
-		raw: `<span>foo</span>`
+		raw: '<span>foo</span>'
 	},
 
 	test({ assert, component, target }) {
@@ -8,6 +8,6 @@ export default {
 		assert.ok(!span.previousSibling);
 		assert.ok(!span.nextSibling);
 
-		component.raw = `<span>bar</span>`;
+		component.raw = '<span>bar</span>';
 	}
 };
diff --git a/test/runtime/samples/raw-anchor-last-child/_config.js b/test/runtime/samples/raw-anchor-last-child/_config.js
index ea2217b4c1..dcc8ac6db6 100644
--- a/test/runtime/samples/raw-anchor-last-child/_config.js
+++ b/test/runtime/samples/raw-anchor-last-child/_config.js
@@ -1,12 +1,12 @@
 export default {
 	props: {
-		raw: `<span>foo</span>`
+		raw: '<span>foo</span>'
 	},
 
 	test({ assert, component, target }) {
 		const span = target.querySelector('span');
 		assert.ok(!span.nextSibling);
 
-		component.raw = `<span>bar</span>`;
+		component.raw = '<span>bar</span>';
 	}
 };
diff --git a/test/runtime/samples/raw-anchor-next-previous-sibling/_config.js b/test/runtime/samples/raw-anchor-next-previous-sibling/_config.js
index d28e84fc3b..c6d2b561c0 100644
--- a/test/runtime/samples/raw-anchor-next-previous-sibling/_config.js
+++ b/test/runtime/samples/raw-anchor-next-previous-sibling/_config.js
@@ -1,6 +1,6 @@
 export default {
 	props: {
-		raw: `<span>foo</span>`
+		raw: '<span>foo</span>'
 	},
 
 	test({ assert, component, target }) {
@@ -8,6 +8,6 @@ export default {
 		assert.equal(span.previousSibling.nodeName, 'BR');
 		assert.equal(span.nextSibling.nodeName, 'BR');
 
-		component.raw = `<span>bar</span>`;
+		component.raw = '<span>bar</span>';
 	}
 };
diff --git a/test/runtime/samples/raw-anchor-next-sibling/_config.js b/test/runtime/samples/raw-anchor-next-sibling/_config.js
index dc6ad98e2e..1982f28da5 100644
--- a/test/runtime/samples/raw-anchor-next-sibling/_config.js
+++ b/test/runtime/samples/raw-anchor-next-sibling/_config.js
@@ -1,12 +1,12 @@
 export default {
 	props: {
-		raw: `<span>foo</span>`
+		raw: '<span>foo</span>'
 	},
 
 	test({ assert, component, target }) {
 		const span = target.querySelector('span');
 		assert.equal(span.previousSibling.nodeName, 'BR');
 
-		component.raw = `<span>bar</span>`;
+		component.raw = '<span>bar</span>';
 	}
 };
diff --git a/test/runtime/samples/raw-anchor-previous-sibling/_config.js b/test/runtime/samples/raw-anchor-previous-sibling/_config.js
index dc6ad98e2e..1982f28da5 100644
--- a/test/runtime/samples/raw-anchor-previous-sibling/_config.js
+++ b/test/runtime/samples/raw-anchor-previous-sibling/_config.js
@@ -1,12 +1,12 @@
 export default {
 	props: {
-		raw: `<span>foo</span>`
+		raw: '<span>foo</span>'
 	},
 
 	test({ assert, component, target }) {
 		const span = target.querySelector('span');
 		assert.equal(span.previousSibling.nodeName, 'BR');
 
-		component.raw = `<span>bar</span>`;
+		component.raw = '<span>bar</span>';
 	}
 };
diff --git a/test/runtime/samples/raw-mustache-as-root/_config.js b/test/runtime/samples/raw-mustache-as-root/_config.js
index e42fa7f517..a38c0b1c81 100644
--- a/test/runtime/samples/raw-mustache-as-root/_config.js
+++ b/test/runtime/samples/raw-mustache-as-root/_config.js
@@ -5,8 +5,8 @@ export default {
 		<p>This line should be last.</p>
 	`,
 	async test({ assert, target, window }) {
-		const btn = target.querySelector("button");
-		const clickEvent = new window.MouseEvent("click");
+		const btn = target.querySelector('button');
+		const clickEvent = new window.MouseEvent('click');
 
 		await btn.dispatchEvent(clickEvent);
 
diff --git a/test/runtime/samples/raw-mustache-before-element/_config.js b/test/runtime/samples/raw-mustache-before-element/_config.js
index 61288cbb52..e00ca11a20 100644
--- a/test/runtime/samples/raw-mustache-before-element/_config.js
+++ b/test/runtime/samples/raw-mustache-before-element/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>x<span>baz</span></p>`
+	html: '<p>x<span>baz</span></p>'
 };
diff --git a/test/runtime/samples/raw-mustache-inside-head/_config.js b/test/runtime/samples/raw-mustache-inside-head/_config.js
index 7923fc7238..6d28a6e8c4 100644
--- a/test/runtime/samples/raw-mustache-inside-head/_config.js
+++ b/test/runtime/samples/raw-mustache-inside-head/_config.js
@@ -1,7 +1,7 @@
 export default {
 	async test({ assert, target, window }) {
-		const btn = target.querySelector("button");
-		const clickEvent = new window.MouseEvent("click");
+		const btn = target.querySelector('button');
+		const clickEvent = new window.MouseEvent('click');
 
 		assert.equal(window.document.head.innerHTML.includes('<style>body { color: blue; }</style><style>body { color: green; }</style>'), true);
 
diff --git a/test/runtime/samples/raw-mustache-inside-slot/_config.js b/test/runtime/samples/raw-mustache-inside-slot/_config.js
index e42fa7f517..a38c0b1c81 100644
--- a/test/runtime/samples/raw-mustache-inside-slot/_config.js
+++ b/test/runtime/samples/raw-mustache-inside-slot/_config.js
@@ -5,8 +5,8 @@ export default {
 		<p>This line should be last.</p>
 	`,
 	async test({ assert, target, window }) {
-		const btn = target.querySelector("button");
-		const clickEvent = new window.MouseEvent("click");
+		const btn = target.querySelector('button');
+		const clickEvent = new window.MouseEvent('click');
 
 		await btn.dispatchEvent(clickEvent);
 
diff --git a/test/runtime/samples/raw-mustaches-preserved/_config.js b/test/runtime/samples/raw-mustaches-preserved/_config.js
index 66b829f7cb..d4d57025d2 100644
--- a/test/runtime/samples/raw-mustaches-preserved/_config.js
+++ b/test/runtime/samples/raw-mustaches-preserved/_config.js
@@ -5,13 +5,13 @@ export default {
 		raw: '<p>does not change</p>'
 	},
 
-	html: `<div><p>does not change</p></div>`,
+	html: '<div><p>does not change</p></div>',
 
 	test({ assert, component, target }) {
 		const p = target.querySelector('p');
 
 		component.raw = '<p>does not change</p>';
-		assert.equal(target.innerHTML, `<div><p>does not change</p></div>`);
+		assert.equal(target.innerHTML, '<div><p>does not change</p></div>');
 		assert.strictEqual(target.querySelector('p'), p);
 	}
 };
diff --git a/test/runtime/samples/raw-mustaches-td-tr/_config.js b/test/runtime/samples/raw-mustaches-td-tr/_config.js
index 1bcad157f3..3b165bb65e 100644
--- a/test/runtime/samples/raw-mustaches-td-tr/_config.js
+++ b/test/runtime/samples/raw-mustaches-td-tr/_config.js
@@ -1,6 +1,6 @@
 export default {
 	props: {
-		raw: "<tr><td>1</td><td>2</td></tr>"
+		raw: '<tr><td>1</td><td>2</td></tr>'
 	},
 
 	html: `
diff --git a/test/runtime/samples/raw-mustaches/_config.js b/test/runtime/samples/raw-mustaches/_config.js
index cc9999aa34..9eda8289ce 100644
--- a/test/runtime/samples/raw-mustaches/_config.js
+++ b/test/runtime/samples/raw-mustaches/_config.js
@@ -5,13 +5,13 @@ export default {
 		raw: '<span><em>raw html!!!\\o/</span></em>'
 	},
 
-	html: `before<span><em>raw html!!!\\o/</span></em>after`,
+	html: 'before<span><em>raw html!!!\\o/</span></em>after',
 
 	test({ assert, component, target }) {
 		component.raw = '';
-		assert.equal(target.innerHTML, `beforeafter`);
+		assert.equal(target.innerHTML, 'beforeafter');
 		component.raw = 'how about <strong>unclosed elements?';
-		assert.equal(target.innerHTML, `beforehow about <strong>unclosed elements?</strong>after`);
+		assert.equal(target.innerHTML, 'beforehow about <strong>unclosed elements?</strong>after');
 		component.$destroy();
 		assert.equal(target.innerHTML, '');
 	}
diff --git a/test/runtime/samples/reactive-assignment-in-assignment-rhs/_config.js b/test/runtime/samples/reactive-assignment-in-assignment-rhs/_config.js
index f0bf2cdc70..cb79802589 100644
--- a/test/runtime/samples/reactive-assignment-in-assignment-rhs/_config.js
+++ b/test/runtime/samples/reactive-assignment-in-assignment-rhs/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<h1>1 1</h1>`
+	html: '<h1>1 1</h1>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store-2/_config.js b/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store-2/_config.js
index f737cad2aa..3fd83aa9b2 100644
--- a/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store-2/_config.js
+++ b/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store-2/_config.js
@@ -1,9 +1,9 @@
 // destructure to store value
 export default {
 	skip_if_ssr: true, // pending https://github.com/sveltejs/svelte/issues/3582
-	html: `<h1>2 2 xxx 5 6 9 10 2</h1>`,
+	html: '<h1>2 2 xxx 5 6 9 10 2</h1>',
 	async test({ assert, target, component }) {
 		await component.update();
-		assert.htmlEqual(target.innerHTML, `<h1>11 11 yyy 12 13 14 15 11</h1>`);
+		assert.htmlEqual(target.innerHTML, '<h1>11 11 yyy 12 13 14 15 11</h1>');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store/_config.js b/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store/_config.js
index 0318e63b0a..b57ae31d48 100644
--- a/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store/_config.js
+++ b/test/runtime/samples/reactive-assignment-in-complex-declaration-with-store/_config.js
@@ -1,9 +1,9 @@
 // destructure to store
 export default {
-	html: `<h1>2 2 xxx 5 6 9 10 2</h1>`,
+	html: '<h1>2 2 xxx 5 6 9 10 2</h1>',
 	skip_if_ssr: true,
 	async test({ assert, target, component }) {
 		await component.update();
-		assert.htmlEqual(target.innerHTML, `<h1>11 11 yyy 12 13 14 15 11</h1>`);
+		assert.htmlEqual(target.innerHTML, '<h1>11 11 yyy 12 13 14 15 11</h1>');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/reactive-assignment-in-complex-declaration/_config.js b/test/runtime/samples/reactive-assignment-in-complex-declaration/_config.js
index d17a81e052..a24254044a 100644
--- a/test/runtime/samples/reactive-assignment-in-complex-declaration/_config.js
+++ b/test/runtime/samples/reactive-assignment-in-complex-declaration/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<h1>2 2</h1>`
+	html: '<h1>2 2</h1>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/reactive-assignment-in-declaration/_config.js b/test/runtime/samples/reactive-assignment-in-declaration/_config.js
index f0bf2cdc70..cb79802589 100644
--- a/test/runtime/samples/reactive-assignment-in-declaration/_config.js
+++ b/test/runtime/samples/reactive-assignment-in-declaration/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<h1>1 1</h1>`
+	html: '<h1>1 1</h1>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/reactive-assignment-in-for-loop-head/_config.js b/test/runtime/samples/reactive-assignment-in-for-loop-head/_config.js
index df64f577df..01dcabe073 100644
--- a/test/runtime/samples/reactive-assignment-in-for-loop-head/_config.js
+++ b/test/runtime/samples/reactive-assignment-in-for-loop-head/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<h1>0 0</h1>`
+	html: '<h1>0 0</h1>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/reactive-block-break/_config.js b/test/runtime/samples/reactive-block-break/_config.js
index f2d3e6a8f5..a7fdffaaf1 100644
--- a/test/runtime/samples/reactive-block-break/_config.js
+++ b/test/runtime/samples/reactive-block-break/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<h1>1 2</h1>`
+	html: '<h1>1 2</h1>'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/reactive-import-statement-2/_config.js b/test/runtime/samples/reactive-import-statement-2/_config.js
index ccc97cd076..fc6d8f008d 100644
--- a/test/runtime/samples/reactive-import-statement-2/_config.js
+++ b/test/runtime/samples/reactive-import-statement-2/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>prop value</p>`
+	html: '<p>prop value</p>'
 };
diff --git a/test/runtime/samples/reactive-value-coerce/_config.js b/test/runtime/samples/reactive-value-coerce/_config.js
index 7d8bcb6b50..9cf9d7d8ee 100644
--- a/test/runtime/samples/reactive-value-coerce/_config.js
+++ b/test/runtime/samples/reactive-value-coerce/_config.js
@@ -1,10 +1,10 @@
 export default {
-	html: `1-1`,
+	html: '1-1',
 
 	test: ({ assert, component, target }) => {
 		component.a.b[0] = 2;
 		component.a = component.a; // eslint-disable-line no-self-assign
 
-		assert.htmlEqual(target.innerHTML, `2-2`);
+		assert.htmlEqual(target.innerHTML, '2-2');
 	}
 };
diff --git a/test/runtime/samples/reactive-value-function/_config.js b/test/runtime/samples/reactive-value-function/_config.js
index c2de1af713..2a84953576 100644
--- a/test/runtime/samples/reactive-value-function/_config.js
+++ b/test/runtime/samples/reactive-value-function/_config.js
@@ -1,9 +1,9 @@
 export default {
-	html: `1-2`,
+	html: '1-2',
 
 	async test({ assert, component, target }) {
 		await component.update();
 
-		assert.htmlEqual(target.innerHTML, `3-4`);
+		assert.htmlEqual(target.innerHTML, '3-4');
 	}
 };
diff --git a/test/runtime/samples/reactive-value-mutate/_config.js b/test/runtime/samples/reactive-value-mutate/_config.js
index e408816834..66979f1e31 100644
--- a/test/runtime/samples/reactive-value-mutate/_config.js
+++ b/test/runtime/samples/reactive-value-mutate/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `{"bar":42}`
+	html: '{"bar":42}'
 };
diff --git a/test/runtime/samples/semicolon-hoisting/_config.js b/test/runtime/samples/semicolon-hoisting/_config.js
index 88d81cdc9e..7da2831db4 100644
--- a/test/runtime/samples/semicolon-hoisting/_config.js
+++ b/test/runtime/samples/semicolon-hoisting/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: ``
+	html: ''
 };
\ No newline at end of file
diff --git a/test/runtime/samples/set-undefined-attr/_config.js b/test/runtime/samples/set-undefined-attr/_config.js
index a0df368e65..49c4216e57 100644
--- a/test/runtime/samples/set-undefined-attr/_config.js
+++ b/test/runtime/samples/set-undefined-attr/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<div draggable='false'></div>`,
+	html: "<div draggable='false'></div>",
 
-	ssrHtml: `<div foo='1' draggable='false'></div>`
+	ssrHtml: "<div foo='1' draggable='false'></div>"
 };
diff --git a/test/runtime/samples/sigil-component-prop/_config.js b/test/runtime/samples/sigil-component-prop/_config.js
index 9f84a59994..105f8b468c 100644
--- a/test/runtime/samples/sigil-component-prop/_config.js
+++ b/test/runtime/samples/sigil-component-prop/_config.js
@@ -3,5 +3,5 @@ export default {
 		dev: true
 	},
 	props: { foo: 'foo' },
-	html: `<div>foo @ foo # foo</div>`
+	html: '<div>foo @ foo # foo</div>'
 };
diff --git a/test/runtime/samples/sigil-expression-function-body/_config.js b/test/runtime/samples/sigil-expression-function-body/_config.js
index fccd0db2d0..8d88d1fd08 100644
--- a/test/runtime/samples/sigil-expression-function-body/_config.js
+++ b/test/runtime/samples/sigil-expression-function-body/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `@foo`
+	html: '@foo'
 };
diff --git a/test/runtime/samples/sigil-static-#/_config.js b/test/runtime/samples/sigil-static-#/_config.js
index 747ddc2a94..2f75f5cda2 100644
--- a/test/runtime/samples/sigil-static-#/_config.js
+++ b/test/runtime/samples/sigil-static-#/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `#foo`
+	html: '#foo'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/sigil-static-@/_config.js b/test/runtime/samples/sigil-static-@/_config.js
index ada3a602ab..7155a3d1d0 100644
--- a/test/runtime/samples/sigil-static-@/_config.js
+++ b/test/runtime/samples/sigil-static-@/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `@foo`
+	html: '@foo'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/slot-if-block-update-no-anchor/_config.js b/test/runtime/samples/slot-if-block-update-no-anchor/_config.js
index 58d2b49ade..f05d79c265 100644
--- a/test/runtime/samples/slot-if-block-update-no-anchor/_config.js
+++ b/test/runtime/samples/slot-if-block-update-no-anchor/_config.js
@@ -1,7 +1,7 @@
 export default {
 	test({ assert, target, component }) {
-		assert.htmlEqual(target.innerHTML, `<span></span>`);
+		assert.htmlEqual(target.innerHTML, '<span></span>');
 		component.enabled = true;
-		assert.htmlEqual(target.innerHTML, `<span>enabled</span>`);
+		assert.htmlEqual(target.innerHTML, '<span>enabled</span>');
 	}
 };
diff --git a/test/runtime/samples/spread-component-dynamic-undefined/_config.js b/test/runtime/samples/spread-component-dynamic-undefined/_config.js
index e7e205a34b..ba41df3e54 100644
--- a/test/runtime/samples/spread-component-dynamic-undefined/_config.js
+++ b/test/runtime/samples/spread-component-dynamic-undefined/_config.js
@@ -5,13 +5,13 @@ export default {
 		}
 	},
 
-	html: ``,
+	html: '',
 
 	test({ assert, component, target }) {
 		component.props = {
 			a: 2
 		};
 
-		assert.htmlEqual(target.innerHTML, ``);
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
diff --git a/test/runtime/samples/spread-component-dynamic/_config.js b/test/runtime/samples/spread-component-dynamic/_config.js
index 08df27e1c2..7992a30514 100644
--- a/test/runtime/samples/spread-component-dynamic/_config.js
+++ b/test/runtime/samples/spread-component-dynamic/_config.js
@@ -14,6 +14,6 @@ export default {
 			a: 2
 		};
 
-		assert.htmlEqual(target.innerHTML, `<p>a: 2</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>a: 2</p>');
 	}
 };
diff --git a/test/runtime/samples/spread-component-multiple-dependencies/_config.js b/test/runtime/samples/spread-component-multiple-dependencies/_config.js
index 070916ebd8..ee2c0feda8 100644
--- a/test/runtime/samples/spread-component-multiple-dependencies/_config.js
+++ b/test/runtime/samples/spread-component-multiple-dependencies/_config.js
@@ -1,10 +1,10 @@
 export default {
-	html: `b baz`,
+	html: 'b baz',
 	test({ assert, component, target }) {
 		component.foo = true;
 		assert.htmlEqual(
 			target.innerHTML,
-			`a baz`
+			'a baz'
 		);
 	}
 };
diff --git a/test/runtime/samples/spread-element-boolean/_config.js b/test/runtime/samples/spread-element-boolean/_config.js
index d336dae029..3ceeb3f677 100644
--- a/test/runtime/samples/spread-element-boolean/_config.js
+++ b/test/runtime/samples/spread-element-boolean/_config.js
@@ -18,7 +18,7 @@ export default {
 
 		assert.htmlEqual(
 			target.innerHTML,
-			`<button>click me</button>`
+			'<button>click me</button>'
 		);
 		assert.ok(!button.disabled);
 	}
diff --git a/test/runtime/samples/spread-element-class/_config.js b/test/runtime/samples/spread-element-class/_config.js
index 7fc3d49012..b699848210 100644
--- a/test/runtime/samples/spread-element-class/_config.js
+++ b/test/runtime/samples/spread-element-class/_config.js
@@ -1,7 +1,7 @@
 export default {
-	html: `<div class='foo bar'>hello</div>`,
+	html: "<div class='foo bar'>hello</div>",
 	test({ assert, component, target }) {
 		component.blah = 'goodbye';
-		assert.htmlEqual(target.innerHTML, `<div class='foo bar'>goodbye</div>`);
+		assert.htmlEqual(target.innerHTML, "<div class='foo bar'>goodbye</div>");
 	}
 };
diff --git a/test/runtime/samples/spread-element-input-bind-group-with-value-attr/_config.js b/test/runtime/samples/spread-element-input-bind-group-with-value-attr/_config.js
index 6e1b890351..4bbc9d278c 100644
--- a/test/runtime/samples/spread-element-input-bind-group-with-value-attr/_config.js
+++ b/test/runtime/samples/spread-element-input-bind-group-with-value-attr/_config.js
@@ -5,7 +5,7 @@ export default {
 		}
 	},
 
-	html: `<input data-foo="bar" type="radio" value="abc">`,
+	html: '<input data-foo="bar" type="radio" value="abc">',
 
 	async test({ assert, component, target, window }) {
 		const input = target.querySelector('input');
diff --git a/test/runtime/samples/spread-element-input-value-undefined/_config.js b/test/runtime/samples/spread-element-input-value-undefined/_config.js
index d66e215cde..9a83dccd80 100644
--- a/test/runtime/samples/spread-element-input-value-undefined/_config.js
+++ b/test/runtime/samples/spread-element-input-value-undefined/_config.js
@@ -1,12 +1,12 @@
 export default {
 	async test({ assert, component, target, window }) {
-		const input = target.querySelector("input");
+		const input = target.querySelector('input');
 		component.value = undefined;
 
-		assert.equal(input.value, "undefined");
+		assert.equal(input.value, 'undefined');
 
-		component.value = "foobar";
+		component.value = 'foobar';
 
-		assert.equal(input.value, "foobar");
+		assert.equal(input.value, 'foobar');
 	}
 };
diff --git a/test/runtime/samples/spread-element-input-value/_config.js b/test/runtime/samples/spread-element-input-value/_config.js
index abb63ceab3..0df088159a 100644
--- a/test/runtime/samples/spread-element-input-value/_config.js
+++ b/test/runtime/samples/spread-element-input-value/_config.js
@@ -1,6 +1,6 @@
 export default {
 	async test({ assert, component, target, window }) {
-		const [input1, input2] = target.querySelectorAll("input");
+		const [input1, input2] = target.querySelectorAll('input');
 
 		// we are not able emulate user interaction in jsdom,
 		// therefore, jsdom could not validate minlength / maxlength
@@ -14,7 +14,7 @@ export default {
 		const spy1 = spyOnValueSetter(input1, input1.value);
 		const spy2 = spyOnValueSetter(input2, input2.value);
 		
-		const event = new window.Event("input");
+		const event = new window.Event('input');
 		
 		input1.value = '12345';
 		spy1.reset();
@@ -41,7 +41,7 @@ export default {
 function spyOnValueSetter(input, initialValue) {
 	let value = initialValue;
 	let isSet = false;
-	Object.defineProperty(input, "value", {
+	Object.defineProperty(input, 'value', {
 		get() {
 			return value;
 		},
diff --git a/test/runtime/samples/spread-element-input/_config.js b/test/runtime/samples/spread-element-input/_config.js
index 80685b9d20..2e68e9832f 100644
--- a/test/runtime/samples/spread-element-input/_config.js
+++ b/test/runtime/samples/spread-element-input/_config.js
@@ -5,5 +5,5 @@ export default {
 		}
 	},
 
-	html: `<input data-foo="bar">`
+	html: '<input data-foo="bar">'
 };
diff --git a/test/runtime/samples/spread-element-multiple-dependencies/_config.js b/test/runtime/samples/spread-element-multiple-dependencies/_config.js
index 480eb6621c..6183e6bf6e 100644
--- a/test/runtime/samples/spread-element-multiple-dependencies/_config.js
+++ b/test/runtime/samples/spread-element-multiple-dependencies/_config.js
@@ -1,10 +1,10 @@
 export default {
-	html: `<div class='b' title='baz'></div>`,
+	html: "<div class='b' title='baz'></div>",
 	test({ assert, component, target }) {
 		component.foo = true;
 		assert.htmlEqual(
 			target.innerHTML,
-			`<div class='a' title='baz'></div>`
+			"<div class='a' title='baz'></div>"
 		);
 	}
 };
diff --git a/test/runtime/samples/spread-element-multiple/_config.js b/test/runtime/samples/spread-element-multiple/_config.js
index 0c04b16d40..38afe2fe8e 100644
--- a/test/runtime/samples/spread-element-multiple/_config.js
+++ b/test/runtime/samples/spread-element-multiple/_config.js
@@ -25,7 +25,7 @@ export default {
 
 		assert.htmlEqual(
 			target.innerHTML,
-			`<div data-one="10" data-b="b" data-c="new" data-d="DEEEEEE" >test</div>`
+			'<div data-one="10" data-b="b" data-c="new" data-d="DEEEEEE" >test</div>'
 		);
 	}
 };
diff --git a/test/runtime/samples/spread-element-readonly/_config.js b/test/runtime/samples/spread-element-readonly/_config.js
index 1d349fd76f..5e33acb0aa 100644
--- a/test/runtime/samples/spread-element-readonly/_config.js
+++ b/test/runtime/samples/spread-element-readonly/_config.js
@@ -1,6 +1,6 @@
 export default {
 	skip_if_ssr: true, // DOM and SSR output is different, a separate SSR test exists
-	html: `<input form="qux" list="quu" />`,
+	html: '<input form="qux" list="quu" />',
 
 	test({ assert, target }) {
 		const div = target.querySelector('input');
diff --git a/test/runtime/samples/spread-element-removal/_config.js b/test/runtime/samples/spread-element-removal/_config.js
index 270804170d..1fd2443369 100644
--- a/test/runtime/samples/spread-element-removal/_config.js
+++ b/test/runtime/samples/spread-element-removal/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<input>`
+	html: '<input>'
 };
diff --git a/test/runtime/samples/spread-element/_config.js b/test/runtime/samples/spread-element/_config.js
index 0763634b0f..2332891b67 100644
--- a/test/runtime/samples/spread-element/_config.js
+++ b/test/runtime/samples/spread-element/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<div data-named="value" data-foo="bar">red</div>`,
+	html: '<div data-named="value" data-foo="bar">red</div>',
 
 	test({ assert, component, target }) {
 		const div = target.querySelector( 'div' );
@@ -9,13 +9,13 @@ export default {
 
 		component.color = 'blue';
 		component.props = { 'data-foo': 'baz', 'data-named': 'qux' };
-		assert.htmlEqual( target.innerHTML, `<div data-named="value" data-foo="baz">blue</div>` );
+		assert.htmlEqual( target.innerHTML, '<div data-named="value" data-foo="baz">blue</div>' );
 		assert.equal( div.dataset.foo, 'baz' );
 		assert.equal( div.dataset.named, 'value' );
 
 		component.color = 'blue';
 		component.props = {};
-		assert.htmlEqual( target.innerHTML, `<div data-named="value">blue</div>` );
+		assert.htmlEqual( target.innerHTML, '<div data-named="value">blue</div>' );
 		assert.equal( div.dataset.foo, undefined );
 	}
 };
diff --git a/test/runtime/samples/spring/_config.js b/test/runtime/samples/spring/_config.js
index 49367ce08b..5fd33b2e51 100644
--- a/test/runtime/samples/spring/_config.js
+++ b/test/runtime/samples/spring/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>0</p>`
+	html: '<p>0</p>'
 };
diff --git a/test/runtime/samples/store-contextual/_config.js b/test/runtime/samples/store-contextual/_config.js
index e06332a233..5600f9a661 100644
--- a/test/runtime/samples/store-contextual/_config.js
+++ b/test/runtime/samples/store-contextual/_config.js
@@ -7,7 +7,7 @@ const todos = [
 ];
 
 export default {
-	error: `Stores must be declared at the top level of the component (this may change in a future version of Svelte)`,
+	error: 'Stores must be declared at the top level of the component (this may change in a future version of Svelte)',
 
 	props: {
 		todos
diff --git a/test/runtime/samples/store-dev-mode-error/_config.js b/test/runtime/samples/store-dev-mode-error/_config.js
index 70b24337fd..420aa0c54a 100644
--- a/test/runtime/samples/store-dev-mode-error/_config.js
+++ b/test/runtime/samples/store-dev-mode-error/_config.js
@@ -7,5 +7,5 @@ export default {
 		count: 0
 	},
 
-	error: `'count' is not a store with a 'subscribe' method`
+	error: "'count' is not a store with a 'subscribe' method"
 };
\ No newline at end of file
diff --git a/test/runtime/samples/store-imported-module-b/_config.js b/test/runtime/samples/store-imported-module-b/_config.js
index 8f75dcc493..7c503c3905 100644
--- a/test/runtime/samples/store-imported-module-b/_config.js
+++ b/test/runtime/samples/store-imported-module-b/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: `Cannot reference store value inside <script context="module">`
+	error: 'Cannot reference store value inside <script context="module">'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/store-increment-updates-reactive/_config.js b/test/runtime/samples/store-increment-updates-reactive/_config.js
index f919d724f8..04bf79d3a3 100644
--- a/test/runtime/samples/store-increment-updates-reactive/_config.js
+++ b/test/runtime/samples/store-increment-updates-reactive/_config.js
@@ -1,8 +1,8 @@
 export default {
-	html: `0`,
+	html: '0',
 
 	async test({ assert, component, target }) {
 		await component.increment();
-		assert.htmlEqual(target.innerHTML, `1`);
+		assert.htmlEqual(target.innerHTML, '1');
 	}
 };
diff --git a/test/runtime/samples/store-prevent-user-declarations/_config.js b/test/runtime/samples/store-prevent-user-declarations/_config.js
index ec099380e8..901ff00eec 100644
--- a/test/runtime/samples/store-prevent-user-declarations/_config.js
+++ b/test/runtime/samples/store-prevent-user-declarations/_config.js
@@ -5,5 +5,5 @@ export default {
 		count: writable(0)
 	},
 
-	error: `The $ prefix is reserved, and cannot be used for variable and import names`
+	error: 'The $ prefix is reserved, and cannot be used for variable and import names'
 };
\ No newline at end of file
diff --git a/test/runtime/samples/store-resubscribe-b/_config.js b/test/runtime/samples/store-resubscribe-b/_config.js
index dd11a863f2..b097a46716 100644
--- a/test/runtime/samples/store-resubscribe-b/_config.js
+++ b/test/runtime/samples/store-resubscribe-b/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `42`
+	html: '42'
 };
diff --git a/test/runtime/samples/store-resubscribe-c/_config.js b/test/runtime/samples/store-resubscribe-c/_config.js
index 80b4fa702d..756e39bcb0 100644
--- a/test/runtime/samples/store-resubscribe-c/_config.js
+++ b/test/runtime/samples/store-resubscribe-c/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `31 42`
+	html: '31 42'
 };
diff --git a/test/runtime/samples/store-resubscribe-export/_config.js b/test/runtime/samples/store-resubscribe-export/_config.js
index 3c8473b3e1..525eb39d51 100644
--- a/test/runtime/samples/store-resubscribe-export/_config.js
+++ b/test/runtime/samples/store-resubscribe-export/_config.js
@@ -22,6 +22,6 @@ export default {
 	async test({ assert, component, target }) {
 		component.foo = fakeStore(5);
 
-		return assert.htmlEqual(target.innerHTML, `<h1>5</h1>`);
+		return assert.htmlEqual(target.innerHTML, '<h1>5</h1>');
 	}
 };
diff --git a/test/runtime/samples/store-resubscribe-observable/_config.js b/test/runtime/samples/store-resubscribe-observable/_config.js
index dd11a863f2..b097a46716 100644
--- a/test/runtime/samples/store-resubscribe-observable/_config.js
+++ b/test/runtime/samples/store-resubscribe-observable/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `42`
+	html: '42'
 };
diff --git a/test/runtime/samples/store-shadow-scope/_config.js b/test/runtime/samples/store-shadow-scope/_config.js
index e2d6fc7808..a197325a2d 100644
--- a/test/runtime/samples/store-shadow-scope/_config.js
+++ b/test/runtime/samples/store-shadow-scope/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: `Stores must be declared at the top level of the component (this may change in a future version of Svelte)`
+	error: 'Stores must be declared at the top level of the component (this may change in a future version of Svelte)'
 };
diff --git a/test/runtime/samples/store-template-expression-scope/_config.js b/test/runtime/samples/store-template-expression-scope/_config.js
index e2d6fc7808..a197325a2d 100644
--- a/test/runtime/samples/store-template-expression-scope/_config.js
+++ b/test/runtime/samples/store-template-expression-scope/_config.js
@@ -1,3 +1,3 @@
 export default {
-	error: `Stores must be declared at the top level of the component (this may change in a future version of Svelte)`
+	error: 'Stores must be declared at the top level of the component (this may change in a future version of Svelte)'
 };
diff --git a/test/runtime/samples/store-unreferenced/_config.js b/test/runtime/samples/store-unreferenced/_config.js
index 0695edf8dc..e15f202492 100644
--- a/test/runtime/samples/store-unreferenced/_config.js
+++ b/test/runtime/samples/store-unreferenced/_config.js
@@ -1,12 +1,12 @@
 import { count } from './store.js';
 
 export default {
-	html: `<p>count: 0</p>`,
+	html: '<p>count: 0</p>',
 
 	async test({ assert, component, target }) {
 		await component.increment();
 
-		assert.htmlEqual(target.innerHTML, `<p>count: 1</p>`);
+		assert.htmlEqual(target.innerHTML, '<p>count: 1</p>');
 
 		count.set(0);
 	}
diff --git a/test/runtime/samples/svg-child-component-declared-namespace-shorthand/_config.js b/test/runtime/samples/svg-child-component-declared-namespace-shorthand/_config.js
index e7f8397390..a3676db286 100644
--- a/test/runtime/samples/svg-child-component-declared-namespace-shorthand/_config.js
+++ b/test/runtime/samples/svg-child-component-declared-namespace-shorthand/_config.js
@@ -6,7 +6,7 @@ export default {
 		height: 100
 	},
 
-	html: `<svg><rect x="0" y="0" width="100" height="100"></rect></svg>`,
+	html: '<svg><rect x="0" y="0" width="100" height="100"></rect></svg>',
 
 	test({ assert, component, target }) {
 		const svg = target.querySelector( 'svg' );
@@ -17,6 +17,6 @@ export default {
 
 		component.width = 150;
 		component.height = 50;
-		assert.equal( target.innerHTML, `<svg><rect x="0" y="0" width="150" height="50"></rect></svg>` );
+		assert.equal( target.innerHTML, '<svg><rect x="0" y="0" width="150" height="50"></rect></svg>' );
 	}
 };
diff --git a/test/runtime/samples/svg-child-component-declared-namespace/_config.js b/test/runtime/samples/svg-child-component-declared-namespace/_config.js
index e7f8397390..a3676db286 100644
--- a/test/runtime/samples/svg-child-component-declared-namespace/_config.js
+++ b/test/runtime/samples/svg-child-component-declared-namespace/_config.js
@@ -6,7 +6,7 @@ export default {
 		height: 100
 	},
 
-	html: `<svg><rect x="0" y="0" width="100" height="100"></rect></svg>`,
+	html: '<svg><rect x="0" y="0" width="100" height="100"></rect></svg>',
 
 	test({ assert, component, target }) {
 		const svg = target.querySelector( 'svg' );
@@ -17,6 +17,6 @@ export default {
 
 		component.width = 150;
 		component.height = 50;
-		assert.equal( target.innerHTML, `<svg><rect x="0" y="0" width="150" height="50"></rect></svg>` );
+		assert.equal( target.innerHTML, '<svg><rect x="0" y="0" width="150" height="50"></rect></svg>' );
 	}
 };
diff --git a/test/runtime/samples/svg-class/_config.js b/test/runtime/samples/svg-class/_config.js
index 3bb353cf58..36f5d06b1c 100644
--- a/test/runtime/samples/svg-class/_config.js
+++ b/test/runtime/samples/svg-class/_config.js
@@ -1,7 +1,7 @@
 // this looks like another JSDOM quirk — svg.className = 'foo' behaves
 // differently from browsers. So this test succeeds even when it should fail
 export default {
-	html: `<svg class='foo'></svg>`,
+	html: "<svg class='foo'></svg>",
 
 	test({ assert, component, target }) {
 		const svg = target.querySelector('svg');
diff --git a/test/runtime/samples/svg-tspan-preserve-space/_config.js b/test/runtime/samples/svg-tspan-preserve-space/_config.js
index 5de74fc012..1042ba1821 100644
--- a/test/runtime/samples/svg-tspan-preserve-space/_config.js
+++ b/test/runtime/samples/svg-tspan-preserve-space/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<svg><text x=0 y=50><tspan>foo</tspan> bar<tspan>foo</tspan> bar</text></svg>`
+	html: '<svg><text x=0 y=50><tspan>foo</tspan> bar<tspan>foo</tspan> bar</text></svg>'
 };
diff --git a/test/runtime/samples/svg-xmlns/_config.js b/test/runtime/samples/svg-xmlns/_config.js
index daf6ef03e4..5cec8da04a 100644
--- a/test/runtime/samples/svg-xmlns/_config.js
+++ b/test/runtime/samples/svg-xmlns/_config.js
@@ -8,7 +8,7 @@ export default {
 		height: 100
 	},
 
-	html: `<svg xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="100" height="100"></rect></svg>`,
+	html: '<svg xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="100" height="100"></rect></svg>',
 
 	test({ assert, component, target }) {
 		const svg = target.querySelector( 'svg' );
@@ -19,6 +19,6 @@ export default {
 
 		component.width = 150;
 		component.height = 50;
-		assert.equal( target.innerHTML, `<svg xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="150" height="50"></rect></svg>` );
+		assert.equal( target.innerHTML, '<svg xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="150" height="50"></rect></svg>' );
 	}
 };
diff --git a/test/runtime/samples/svg/_config.js b/test/runtime/samples/svg/_config.js
index e7f8397390..a3676db286 100644
--- a/test/runtime/samples/svg/_config.js
+++ b/test/runtime/samples/svg/_config.js
@@ -6,7 +6,7 @@ export default {
 		height: 100
 	},
 
-	html: `<svg><rect x="0" y="0" width="100" height="100"></rect></svg>`,
+	html: '<svg><rect x="0" y="0" width="100" height="100"></rect></svg>',
 
 	test({ assert, component, target }) {
 		const svg = target.querySelector( 'svg' );
@@ -17,6 +17,6 @@ export default {
 
 		component.width = 150;
 		component.height = 50;
-		assert.equal( target.innerHTML, `<svg><rect x="0" y="0" width="150" height="50"></rect></svg>` );
+		assert.equal( target.innerHTML, '<svg><rect x="0" y="0" width="150" height="50"></rect></svg>' );
 	}
 };
diff --git a/test/runtime/samples/textarea-children/_config.js b/test/runtime/samples/textarea-children/_config.js
index 8f46370b07..ca59c76a42 100644
--- a/test/runtime/samples/textarea-children/_config.js
+++ b/test/runtime/samples/textarea-children/_config.js
@@ -5,13 +5,13 @@ export default {
 		foo: 42
 	},
 
-	html: `<textarea></textarea>`,
+	html: '<textarea></textarea>',
 
 	test({ assert, component, target }) {
 		const textarea = target.querySelector( 'textarea' );
-		assert.strictEqual( textarea.value, `\n\t<p>not actually an element. 42</p>\n` );
+		assert.strictEqual( textarea.value, '\n\t<p>not actually an element. 42</p>\n' );
 
 		component.foo = 43;
-		assert.strictEqual( textarea.value, `\n\t<p>not actually an element. 43</p>\n` );
+		assert.strictEqual( textarea.value, '\n\t<p>not actually an element. 43</p>\n' );
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/textarea-value/_config.js b/test/runtime/samples/textarea-value/_config.js
index 412754b51f..785aae94cb 100644
--- a/test/runtime/samples/textarea-value/_config.js
+++ b/test/runtime/samples/textarea-value/_config.js
@@ -5,7 +5,7 @@ export default {
 		foo: 42
 	},
 
-	html: `<textarea></textarea>`,
+	html: '<textarea></textarea>',
 
 	test({ assert, component, target }) {
 		const textarea = target.querySelector( 'textarea' );
diff --git a/test/runtime/samples/this-in-function-expressions/_config.js b/test/runtime/samples/this-in-function-expressions/_config.js
index ff04e5fa5f..e5527f0e1d 100644
--- a/test/runtime/samples/this-in-function-expressions/_config.js
+++ b/test/runtime/samples/this-in-function-expressions/_config.js
@@ -1,7 +1,7 @@
 export default {
 	async test({ assert, component, target, window, raf }) {
-		const [_, btn] = target.querySelectorAll("button");
-		const clickEvent = new window.MouseEvent("click");
+		const [_, btn] = target.querySelectorAll('button');
+		const clickEvent = new window.MouseEvent('click');
 
 		await btn.dispatchEvent(clickEvent);
 
diff --git a/test/runtime/samples/transition-css-in-out-in/_config.js b/test/runtime/samples/transition-css-in-out-in/_config.js
index a7404318e4..cd7ae14ce8 100644
--- a/test/runtime/samples/transition-css-in-out-in/_config.js
+++ b/test/runtime/samples/transition-css-in-out-in/_config.js
@@ -3,18 +3,18 @@ export default {
 		component.visible = true;
 		const div = target.querySelector('div');
 
-		assert.equal(div.style.animation, `__svelte_3809512021_0 100ms linear 0ms 1 both`);
+		assert.equal(div.style.animation, '__svelte_3809512021_0 100ms linear 0ms 1 both');
 
 		raf.tick(50);
 		component.visible = false;
 
 		// both in and out styles
-		assert.equal(div.style.animation, `__svelte_3809512021_0 100ms linear 0ms 1 both, __svelte_3750847757_0 100ms linear 0ms 1 both`);
+		assert.equal(div.style.animation, '__svelte_3809512021_0 100ms linear 0ms 1 both, __svelte_3750847757_0 100ms linear 0ms 1 both');
 
 		raf.tick(75);
 		component.visible = true;
 
 		// reset original styles
-		assert.equal(div.style.animation, `__svelte_3809512021_1 100ms linear 0ms 1 both`);
+		assert.equal(div.style.animation, '__svelte_3809512021_1 100ms linear 0ms 1 both');
 	}
 };
diff --git a/test/runtime/samples/transition-js-if-outro-unrelated-component-binding-update/_config.js b/test/runtime/samples/transition-js-if-outro-unrelated-component-binding-update/_config.js
index 825ea56308..3f1b714a7c 100644
--- a/test/runtime/samples/transition-js-if-outro-unrelated-component-binding-update/_config.js
+++ b/test/runtime/samples/transition-js-if-outro-unrelated-component-binding-update/_config.js
@@ -1,9 +1,9 @@
 export default {
 	async test({ assert, target, window, raf }) {
-		const button = target.querySelector("button");
-		const event = new window.MouseEvent("click");
+		const button = target.querySelector('button');
+		const event = new window.MouseEvent('click');
 		await button.dispatchEvent(event);
 		raf.tick(500);
-		assert.htmlEqual(target.innerHTML, "");
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
diff --git a/test/runtime/samples/transition-js-if-outro-unrelated-component-store-update/_config.js b/test/runtime/samples/transition-js-if-outro-unrelated-component-store-update/_config.js
index 4f7dc07510..beea5d4a77 100644
--- a/test/runtime/samples/transition-js-if-outro-unrelated-component-store-update/_config.js
+++ b/test/runtime/samples/transition-js-if-outro-unrelated-component-store-update/_config.js
@@ -2,6 +2,6 @@ export default {
 	async test({ assert, target, component, raf }) {
 		await component.condition.set(false);
 		raf.tick(500);
-		assert.htmlEqual(target.innerHTML, "");
+		assert.htmlEqual(target.innerHTML, '');
 	}
 };
diff --git a/test/runtime/samples/unchanged-expression-xss/_config.js b/test/runtime/samples/unchanged-expression-xss/_config.js
index 492be2ab49..4b9f1deff2 100644
--- a/test/runtime/samples/unchanged-expression-xss/_config.js
+++ b/test/runtime/samples/unchanged-expression-xss/_config.js
@@ -1,3 +1,3 @@
 export default {
-	html: `<p>&lt;b\nstyle='color:\nred;'&gt;RED?!?&lt;/b&gt;</p>`
+	html: "<p>&lt;b\nstyle='color:\nred;'&gt;RED?!?&lt;/b&gt;</p>"
 };
diff --git a/test/runtime/samples/whitespace-each-block/_config.js b/test/runtime/samples/whitespace-each-block/_config.js
index 5913ec41cc..fe9fefd7ee 100644
--- a/test/runtime/samples/whitespace-each-block/_config.js
+++ b/test/runtime/samples/whitespace-each-block/_config.js
@@ -6,7 +6,7 @@ export default {
 	test({ assert, component, target }) {
 		assert.equal(
 			target.textContent,
-			`a b c `
+			'a b c '
 		);
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/whitespace-normal/_config.js b/test/runtime/samples/whitespace-normal/_config.js
index e6716b46a8..ea32292d74 100644
--- a/test/runtime/samples/whitespace-normal/_config.js
+++ b/test/runtime/samples/whitespace-normal/_config.js
@@ -6,7 +6,7 @@ export default {
 	test({ assert, component, target }) {
 		assert.equal(
 			target.textContent,
-			`Hello world! How are you?`
+			'Hello world! How are you?'
 		);
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/window-bind-scroll-update/_config.js b/test/runtime/samples/window-bind-scroll-update/_config.js
index 384919d199..ac6f54ad55 100644
--- a/test/runtime/samples/window-bind-scroll-update/_config.js
+++ b/test/runtime/samples/window-bind-scroll-update/_config.js
@@ -1,4 +1,4 @@
-import { env, useFakeTimers } from "../../../helpers";
+import { env, useFakeTimers } from '../../../helpers';
 
 let clock;
 
diff --git a/test/runtime/samples/window-binding-resize/_config.js b/test/runtime/samples/window-binding-resize/_config.js
index 1429f67db8..da58d083da 100644
--- a/test/runtime/samples/window-binding-resize/_config.js
+++ b/test/runtime/samples/window-binding-resize/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<div>1024x768</div>`,
+	html: '<div>1024x768</div>',
 
 	before_test() {
 		Object.defineProperties(window, {
diff --git a/test/runtime/samples/window-binding-scroll-store/_config.js b/test/runtime/samples/window-binding-scroll-store/_config.js
index d1ad2ae766..0ce87efee0 100644
--- a/test/runtime/samples/window-binding-scroll-store/_config.js
+++ b/test/runtime/samples/window-binding-scroll-store/_config.js
@@ -23,7 +23,7 @@ export default {
 
 		assert.htmlEqual(
 			target.innerHTML,
-			`<p style="position: fixed; top: 1em; left: 1em;">scroll\ny\nis\n234.\n234\n*\n234\n=\n54756</p><div style="height: 9999px;"></div>`
+			'<p style="position: fixed; top: 1em; left: 1em;">scroll\ny\nis\n234.\n234\n*\n234\n=\n54756</p><div style="height: 9999px;"></div>'
 		);
 	}
 };
diff --git a/test/runtime/samples/window-event-context/_config.js b/test/runtime/samples/window-event-context/_config.js
index 458a15719f..5a0f635bd4 100644
--- a/test/runtime/samples/window-event-context/_config.js
+++ b/test/runtime/samples/window-event-context/_config.js
@@ -3,7 +3,7 @@ export default {
 		foo: true
 	},
 
-	html: `true`,
+	html: 'true',
 
 	skip: /^v4/.test(process.version), // node 4 apparently does some dumb stuff
 	skip_if_ssr: true, // there's some kind of weird bug with this test... it compiles with the wrong require.extensions hook for some bizarre reason
@@ -13,10 +13,10 @@ export default {
 
 		await window.dispatchEvent(event);
 		assert.equal(component.foo, false);
-		assert.htmlEqual(target.innerHTML, `false`);
+		assert.htmlEqual(target.innerHTML, 'false');
 
 		await window.dispatchEvent(event);
 		assert.equal(component.foo, true);
-		assert.htmlEqual(target.innerHTML, `true`);
+		assert.htmlEqual(target.innerHTML, 'true');
 	}
 };
\ No newline at end of file
diff --git a/test/runtime/samples/window-event-custom/_config.js b/test/runtime/samples/window-event-custom/_config.js
index 8a12e07eda..15644bc8e8 100644
--- a/test/runtime/samples/window-event-custom/_config.js
+++ b/test/runtime/samples/window-event-custom/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<p>escaped: false</p>`,
+	html: '<p>escaped: false</p>',
 
 	async test({ assert, component, target, window }) {
 		const event = new window.KeyboardEvent('keydown', {
diff --git a/test/runtime/samples/window-event/_config.js b/test/runtime/samples/window-event/_config.js
index bd09487f5e..1dd4ea4b6a 100644
--- a/test/runtime/samples/window-event/_config.js
+++ b/test/runtime/samples/window-event/_config.js
@@ -1,5 +1,5 @@
 export default {
-	html: `<div>undefinedxundefined</div>`,
+	html: '<div>undefinedxundefined</div>',
 
 	skip_if_ssr: true, // there's some kind of weird bug with this test... it compiles with the wrong require.extensions hook for some bizarre reason
 
diff --git a/test/server-side-rendering/index.ts b/test/server-side-rendering/index.ts
index 94ab405895..ef2a88ecbe 100644
--- a/test/server-side-rendering/index.ts
+++ b/test/server-side-rendering/index.ts
@@ -1,5 +1,5 @@
-import * as fs from "fs";
-import * as path from "path";
+import * as fs from 'fs';
+import * as path from 'path';
 import glob from 'tiny-glob/sync.js';
 
 import {
@@ -12,13 +12,13 @@ import {
 	cleanRequireCache,
 	shouldUpdateExpected,
 	mkdirp
-} from "../helpers";
+} from '../helpers';
 
 function tryToReadFile(file) {
 	try {
-		return fs.readFileSync(file, "utf-8");
+		return fs.readFileSync(file, 'utf-8');
 	} catch (err) {
-		if (err.code !== "ENOENT") throw err;
+		if (err.code !== 'ENOENT') throw err;
 		return null;
 	}
 }
@@ -26,7 +26,7 @@ function tryToReadFile(file) {
 const sveltePath = process.cwd().split('\\').join('/');
 let compile = null;
 
-describe("ssr", () => {
+describe('ssr', () => {
 	before(() => {
 		compile = loadSvelte(true).compile;
 
@@ -34,7 +34,7 @@ describe("ssr", () => {
 	});
 
 	fs.readdirSync(`${__dirname}/samples`).forEach(dir => {
-		if (dir[0] === ".") return;
+		if (dir[0] === '.') return;
 
 		const config = loadConfig(`${__dirname}/samples/${dir}/_config.js`);
 
@@ -44,7 +44,7 @@ describe("ssr", () => {
 		const show = /\.show/.test(dir);
 
 		if (solo && process.env.CI) {
-			throw new Error("Forgot to remove `solo: true` from test");
+			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
 		(solo ? it.only : it)(dir, () => {
@@ -59,13 +59,13 @@ describe("ssr", () => {
 				format: 'cjs'
 			};
 
-			require("../../register")(compileOptions);
+			require('../../register')(compileOptions);
 
 			try {
 				const Component = require(`${dir}/main.svelte`).default;
 
 				const expectedHtml = tryToReadFile(`${dir}/_expected.html`);
-				const expectedCss = tryToReadFile(`${dir}/_expected.css`) || "";
+				const expectedCss = tryToReadFile(`${dir}/_expected.css`) || '';
 
 				const props = tryToLoadJson(`${dir}/data.json`) || undefined;
 
@@ -88,8 +88,8 @@ describe("ssr", () => {
 
 				try {
 					assert.equal(
-						css.code.replace(/^\s+/gm, "").replace(/[\r\n]/g, ""),
-						expectedCss.replace(/^\s+/gm, "").replace(/[\r\n]/g, "")
+						css.code.replace(/^\s+/gm, '').replace(/[\r\n]/g, ''),
+						expectedCss.replace(/^\s+/gm, '').replace(/[\r\n]/g, '')
 					);
 				} catch (error) {
 					if (shouldUpdateExpected()) {
@@ -128,20 +128,20 @@ describe("ssr", () => {
 	});
 
 	// duplicate client-side tests, as far as possible
-	fs.readdirSync("test/runtime/samples").forEach(dir => {
-		if (dir[0] === ".") return;
+	fs.readdirSync('test/runtime/samples').forEach(dir => {
+		if (dir[0] === '.') return;
 
 		const config = loadConfig(`./runtime/samples/${dir}/_config.js`);
 		const solo = config.solo || /\.solo/.test(dir);
 
 		if (solo && process.env.CI) {
-			throw new Error("Forgot to remove `solo: true` from test");
+			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
 		if (config.skip_if_ssr) return;
 
 		(config.skip ? it.skip : solo ? it.only : it)(dir, () => {
-			const cwd = path.resolve("test/runtime/samples", dir);
+			const cwd = path.resolve('test/runtime/samples', dir);
 
 			cleanRequireCache();
 
@@ -154,7 +154,7 @@ describe("ssr", () => {
 				format: 'cjs'
 			};
 
-			require("../../register")(compileOptions);
+			require('../../register')(compileOptions);
 
 			glob('**/*.svelte', { cwd }).forEach(file => {
 				if (file[0] === '_') return;
diff --git a/test/sourcemaps/index.ts b/test/sourcemaps/index.ts
index da2d79295c..2302685bae 100644
--- a/test/sourcemaps/index.ts
+++ b/test/sourcemaps/index.ts
@@ -1,20 +1,20 @@
-import * as fs from "fs";
-import * as path from "path";
-import * as assert from "assert";
-import { svelte } from "../helpers";
-import { SourceMapConsumer } from "source-map";
-import { getLocator } from "locate-character";
+import * as fs from 'fs';
+import * as path from 'path';
+import * as assert from 'assert';
+import { svelte } from '../helpers';
+import { SourceMapConsumer } from 'source-map';
+import { getLocator } from 'locate-character';
 
-describe("sourcemaps", () => {
+describe('sourcemaps', () => {
 	fs.readdirSync(`${__dirname}/samples`).forEach(dir => {
-		if (dir[0] === ".") return;
+		if (dir[0] === '.') return;
 
 		// add .solo to a sample directory name to only run that test
 		const solo = /\.solo/.test(dir);
 		const skip = /\.skip/.test(dir);
 
 		if (solo && process.env.CI) {
-			throw new Error("Forgot to remove `solo: true` from test");
+			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
 		(solo ? it.only : skip ? it.skip : it)(dir, async () => {
@@ -25,7 +25,7 @@ describe("sourcemaps", () => {
 				`${__dirname}/samples/${dir}/output`
 			);
 
-			const input = fs.readFileSync(filename, "utf-8").replace(/\s+$/, "");
+			const input = fs.readFileSync(filename, 'utf-8').replace(/\s+$/, '');
 			const { js, css } = svelte.compile(input, {
 				filename,
 				outputFilename: `${outputFilename}.js`,
@@ -40,7 +40,7 @@ describe("sourcemaps", () => {
 			);
 			fs.writeFileSync(
 				`${outputFilename}.js.map`,
-				JSON.stringify(js.map, null, "  ")
+				JSON.stringify(js.map, null, '  ')
 			);
 
 			if (css.code) {
@@ -50,12 +50,12 @@ describe("sourcemaps", () => {
 				);
 				fs.writeFileSync(
 					`${outputFilename}.css.map`,
-					JSON.stringify(css.map, null, "  ")
+					JSON.stringify(css.map, null, '  ')
 				);
 			}
 
-			assert.deepEqual(js.map.sources, ["input.svelte"]);
-			if (css.map) assert.deepEqual(css.map.sources, ["input.svelte"]);
+			assert.deepEqual(js.map.sources, ['input.svelte']);
+			if (css.map) assert.deepEqual(css.map.sources, ['input.svelte']);
 
 			const { test } = require(`./samples/${dir}/test.js`);
 
diff --git a/test/validator/index.ts b/test/validator/index.ts
index e93cf1a4bb..1709b7a706 100644
--- a/test/validator/index.ts
+++ b/test/validator/index.ts
@@ -1,23 +1,23 @@
-import * as fs from "fs";
-import * as assert from "assert";
-import { svelte, loadConfig, tryToLoadJson } from "../helpers";
+import * as fs from 'fs';
+import * as assert from 'assert';
+import { svelte, loadConfig, tryToLoadJson } from '../helpers';
 
-describe("validate", () => {
+describe('validate', () => {
 	fs.readdirSync(`${__dirname}/samples`).forEach(dir => {
-		if (dir[0] === ".") return;
+		if (dir[0] === '.') return;
 
 		// add .solo to a sample directory name to only run that test
 		const solo = /\.solo/.test(dir);
 		const skip = /\.skip/.test(dir);
 
 		if (solo && process.env.CI) {
-			throw new Error("Forgot to remove `solo: true` from test");
+			throw new Error('Forgot to remove `solo: true` from test');
 		}
 
 		(solo ? it.only : skip ? it.skip : it)(dir, () => {
 			const config = loadConfig(`${__dirname}/samples/${dir}/_config.js`);
 
-			const input = fs.readFileSync(`${__dirname}/samples/${dir}/input.svelte`, "utf-8").replace(/\s+$/, "").replace(/\r/g, "");
+			const input = fs.readFileSync(`${__dirname}/samples/${dir}/input.svelte`, 'utf-8').replace(/\s+$/, '').replace(/\r/g, '');
 			const expected_warnings = tryToLoadJson(`${__dirname}/samples/${dir}/warnings.json`) || [];
 			const expected_errors = tryToLoadJson(`${__dirname}/samples/${dir}/errors.json`);
 			const options = tryToLoadJson(`${__dirname}/samples/${dir}/options.json`);
@@ -69,18 +69,18 @@ describe("validate", () => {
 		});
 	});
 
-	it("errors if options.name is illegal", () => {
+	it('errors if options.name is illegal', () => {
 		assert.throws(() => {
-			svelte.compile("<div></div>", {
-				name: "not.valid",
+			svelte.compile('<div></div>', {
+				name: 'not.valid',
 				generate: false
 			});
 		}, /options\.name must be a valid identifier/);
 	});
 
-	it("warns if options.name is not capitalised", () => {
-		const { warnings } = svelte.compile("<div></div>", {
-			name: "lowercase",
+	it('warns if options.name is not capitalised', () => {
+		const { warnings } = svelte.compile('<div></div>', {
+			name: 'lowercase',
 			generate: false
 		});
 
@@ -88,14 +88,14 @@ describe("validate", () => {
 			code: w.code,
 			message: w.message
 		})), [{
-			code: `options-lowercase-name`,
-			message: "options.name should be capitalised"
+			code: 'options-lowercase-name',
+			message: 'options.name should be capitalised'
 		}]);
 	});
 
-	it("does not warn if options.name begins with non-alphabetic character", () => {
-		const { warnings } = svelte.compile("<div></div>", {
-			name: "_",
+	it('does not warn if options.name begins with non-alphabetic character', () => {
+		const { warnings } = svelte.compile('<div></div>', {
+			name: '_',
 			generate: false
 		});
 
diff --git a/test/vars/samples/modules-vars/_config.js b/test/vars/samples/modules-vars/_config.js
index e178941db6..52b8940148 100644
--- a/test/vars/samples/modules-vars/_config.js
+++ b/test/vars/samples/modules-vars/_config.js
@@ -2,7 +2,7 @@ export default {
 	test(assert, vars) {
 		assert.deepEqual(vars, [
 			{
-				name: "a",
+				name: 'a',
 				export_name: null,
 				injected: false,
 				module: true,
@@ -13,7 +13,7 @@ export default {
 				writable: true
 			},
 			{
-				name: "b",
+				name: 'b',
 				export_name: null,
 				injected: false,
 				module: true,
@@ -24,7 +24,7 @@ export default {
 				writable: true
 			},
 			{
-				name: "c",
+				name: 'c',
 				export_name: null,
 				injected: false,
 				module: true,
@@ -35,7 +35,7 @@ export default {
 				writable: true
 			},
 			{
-				name: "d",
+				name: 'd',
 				export_name: null,
 				injected: false,
 				module: true,
@@ -46,7 +46,7 @@ export default {
 				writable: true
 			},
 			{
-				name: "c",
+				name: 'c',
 				export_name: null,
 				injected: false,
 				module: false,
@@ -57,7 +57,7 @@ export default {
 				writable: true
 			},
 			{
-				name: "foo",
+				name: 'foo',
 				export_name: null,
 				injected: false,
 				module: false,