diff --git a/src/generators/dom/index.ts b/src/generators/dom/index.ts
index 2ffae2ee2f..046083ac8c 100644
--- a/src/generators/dom/index.ts
+++ b/src/generators/dom/index.ts
@@ -182,9 +182,7 @@ export default function dom(
 	// TODO deprecate component.teardown()
 	builder.addBlock(deindent`
 		function ${name} ( options ) {
-			options = options || {};
-			${options.dev &&
-				`if ( !options.target && !options._root ) throw new Error( "'target' is a required option" );`}
+			if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 			${generator.usesRefs && `this.refs = {};`}
 			this._state = ${templateProperties.data
 				? `@assign( @template.data(), options.data )`
diff --git a/test/js/samples/collapses-text-around-comments/expected-bundle.js b/test/js/samples/collapses-text-around-comments/expected-bundle.js
index e52f943862..6f43916fc4 100644
--- a/test/js/samples/collapses-text-around-comments/expected-bundle.js
+++ b/test/js/samples/collapses-text-around-comments/expected-bundle.js
@@ -201,7 +201,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = assign( template.data(), options.data );
 
 	this._observers = {
diff --git a/test/js/samples/collapses-text-around-comments/expected.js b/test/js/samples/collapses-text-around-comments/expected.js
index 5a3e3d52f6..f5950ceed4 100644
--- a/test/js/samples/collapses-text-around-comments/expected.js
+++ b/test/js/samples/collapses-text-around-comments/expected.js
@@ -53,7 +53,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = assign( template.data(), options.data );
 
 	this._observers = {
diff --git a/test/js/samples/computed-collapsed-if/expected-bundle.js b/test/js/samples/computed-collapsed-if/expected-bundle.js
index 0da5cdf32c..bad6814862 100644
--- a/test/js/samples/computed-collapsed-if/expected-bundle.js
+++ b/test/js/samples/computed-collapsed-if/expected-bundle.js
@@ -154,7 +154,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 	recompute( this._state, this._state, {}, true );
 
diff --git a/test/js/samples/computed-collapsed-if/expected.js b/test/js/samples/computed-collapsed-if/expected.js
index a17e730122..72c7af709f 100644
--- a/test/js/samples/computed-collapsed-if/expected.js
+++ b/test/js/samples/computed-collapsed-if/expected.js
@@ -30,7 +30,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 	recompute( this._state, this._state, {}, true );
 
diff --git a/test/js/samples/css-media-query/expected-bundle.js b/test/js/samples/css-media-query/expected-bundle.js
index 3324ebf9be..068655d2c2 100644
--- a/test/js/samples/css-media-query/expected-bundle.js
+++ b/test/js/samples/css-media-query/expected-bundle.js
@@ -181,7 +181,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/css-media-query/expected.js b/test/js/samples/css-media-query/expected.js
index 72338bb55b..92610d55db 100644
--- a/test/js/samples/css-media-query/expected.js
+++ b/test/js/samples/css-media-query/expected.js
@@ -37,7 +37,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/each-block-changed-check/expected-bundle.js b/test/js/samples/each-block-changed-check/expected-bundle.js
index aac78b9adb..64dec50947 100644
--- a/test/js/samples/each-block-changed-check/expected-bundle.js
+++ b/test/js/samples/each-block-changed-check/expected-bundle.js
@@ -301,7 +301,7 @@ function create_each_block ( state, each_block_value, comment, i, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/each-block-changed-check/expected.js b/test/js/samples/each-block-changed-check/expected.js
index e7683e0743..fc17aac646 100644
--- a/test/js/samples/each-block-changed-check/expected.js
+++ b/test/js/samples/each-block-changed-check/expected.js
@@ -144,7 +144,7 @@ function create_each_block ( state, each_block_value, comment, i, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/event-handlers-custom/expected-bundle.js b/test/js/samples/event-handlers-custom/expected-bundle.js
index ed200a7b4c..5c7dd30034 100644
--- a/test/js/samples/event-handlers-custom/expected-bundle.js
+++ b/test/js/samples/event-handlers-custom/expected-bundle.js
@@ -192,7 +192,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/event-handlers-custom/expected.js b/test/js/samples/event-handlers-custom/expected.js
index 9d5e771bdd..9a699ed073 100644
--- a/test/js/samples/event-handlers-custom/expected.js
+++ b/test/js/samples/event-handlers-custom/expected.js
@@ -48,7 +48,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/if-block-no-update/expected-bundle.js b/test/js/samples/if-block-no-update/expected-bundle.js
index 273ce81fc1..fc22b073b7 100644
--- a/test/js/samples/if-block-no-update/expected-bundle.js
+++ b/test/js/samples/if-block-no-update/expected-bundle.js
@@ -236,7 +236,7 @@ function select_block_type ( state ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/if-block-no-update/expected.js b/test/js/samples/if-block-no-update/expected.js
index 8d30b66a03..f005d6d99b 100644
--- a/test/js/samples/if-block-no-update/expected.js
+++ b/test/js/samples/if-block-no-update/expected.js
@@ -88,7 +88,7 @@ function select_block_type ( state ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/if-block-simple/expected-bundle.js b/test/js/samples/if-block-simple/expected-bundle.js
index 3b57117283..c55f23bd58 100644
--- a/test/js/samples/if-block-simple/expected-bundle.js
+++ b/test/js/samples/if-block-simple/expected-bundle.js
@@ -212,7 +212,7 @@ function create_if_block ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/if-block-simple/expected.js b/test/js/samples/if-block-simple/expected.js
index db04589093..e91e84a0f4 100644
--- a/test/js/samples/if-block-simple/expected.js
+++ b/test/js/samples/if-block-simple/expected.js
@@ -64,7 +64,7 @@ function create_if_block ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/non-imported-component/expected-bundle.js b/test/js/samples/non-imported-component/expected-bundle.js
index b40f56d109..c58837840a 100644
--- a/test/js/samples/non-imported-component/expected-bundle.js
+++ b/test/js/samples/non-imported-component/expected-bundle.js
@@ -184,7 +184,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/non-imported-component/expected.js b/test/js/samples/non-imported-component/expected.js
index 2382e04ab3..05f02e52fe 100644
--- a/test/js/samples/non-imported-component/expected.js
+++ b/test/js/samples/non-imported-component/expected.js
@@ -48,7 +48,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/onrender-onteardown-rewritten/expected-bundle.js b/test/js/samples/onrender-onteardown-rewritten/expected-bundle.js
index a754118158..d8e99521c9 100644
--- a/test/js/samples/onrender-onteardown-rewritten/expected-bundle.js
+++ b/test/js/samples/onrender-onteardown-rewritten/expected-bundle.js
@@ -146,7 +146,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/onrender-onteardown-rewritten/expected.js b/test/js/samples/onrender-onteardown-rewritten/expected.js
index bd473fc2d7..acc2cec5ce 100644
--- a/test/js/samples/onrender-onteardown-rewritten/expected.js
+++ b/test/js/samples/onrender-onteardown-rewritten/expected.js
@@ -22,7 +22,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/setup-method/expected-bundle.js b/test/js/samples/setup-method/expected-bundle.js
index 006152cea5..0286c91e9a 100644
--- a/test/js/samples/setup-method/expected-bundle.js
+++ b/test/js/samples/setup-method/expected-bundle.js
@@ -157,7 +157,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/setup-method/expected.js b/test/js/samples/setup-method/expected.js
index 85f0d5c393..ae144507df 100644
--- a/test/js/samples/setup-method/expected.js
+++ b/test/js/samples/setup-method/expected.js
@@ -33,7 +33,7 @@ function create_main_fragment ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/use-elements-as-anchors/expected-bundle.js b/test/js/samples/use-elements-as-anchors/expected-bundle.js
index 502e08b22e..a064bb5a82 100644
--- a/test/js/samples/use-elements-as-anchors/expected-bundle.js
+++ b/test/js/samples/use-elements-as-anchors/expected-bundle.js
@@ -396,7 +396,7 @@ function create_if_block_4 ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/js/samples/use-elements-as-anchors/expected.js b/test/js/samples/use-elements-as-anchors/expected.js
index 3ed3f1e7db..4e7f19ee9f 100644
--- a/test/js/samples/use-elements-as-anchors/expected.js
+++ b/test/js/samples/use-elements-as-anchors/expected.js
@@ -248,7 +248,7 @@ function create_if_block_4 ( state, component ) {
 }
 
 function SvelteComponent ( options ) {
-	options = options || {};
+	if ( !options || ( !options.target && !options._root ) ) throw new Error( "'target' is a required option" );
 	this._state = options.data || {};
 
 	this._observers = {
diff --git a/test/runtime/index.js b/test/runtime/index.js
index ce30be761b..cbe5785b6d 100644
--- a/test/runtime/index.js
+++ b/test/runtime/index.js
@@ -215,8 +215,7 @@ describe("runtime", () => {
 	it("fails if options.target is missing in dev mode", () => {
 		const { code } = svelte.compile(`<div></div>`, {
 			format: "iife",
-			name: "SvelteComponent",
-			dev: true
+			name: "SvelteComponent"
 		});
 
 		const SvelteComponent = eval(
diff --git a/test/runtime/samples/pass-no-options/_config.js b/test/runtime/samples/pass-no-options/_config.js
deleted file mode 100644
index 9683944f21..0000000000
--- a/test/runtime/samples/pass-no-options/_config.js
+++ /dev/null
@@ -1,8 +0,0 @@
-export default {
-	html: '<h1>Just some static HTML</h1>',
-
-	test ( assert, component, target, window ) {
-		const newComp = new window.SvelteComponent();
-		assert.equal(newComp instanceof window.SvelteComponent, true);
-	}
-};
diff --git a/test/runtime/samples/pass-no-options/main.html b/test/runtime/samples/pass-no-options/main.html
deleted file mode 100644
index bbf302b39e..0000000000
--- a/test/runtime/samples/pass-no-options/main.html
+++ /dev/null
@@ -1 +0,0 @@
-<h1>Just some static HTML</h1>