diff --git a/src/generators/dom/index.ts b/src/generators/dom/index.ts
index 825b5e2a2e..d6ae9849c9 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 c9fa1ef590..c74c34aac5 100644
--- a/test/js/samples/collapses-text-around-comments/expected-bundle.js
+++ b/test/js/samples/collapses-text-around-comments/expected-bundle.js
@@ -188,7 +188,7 @@ 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 a5dc4d5d58..007704ce0c 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 35825f465d..ebc11878c7 100644
--- a/test/js/samples/computed-collapsed-if/expected-bundle.js
+++ b/test/js/samples/computed-collapsed-if/expected-bundle.js
@@ -141,7 +141,7 @@ 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 bb2b420c84..9347d2de6a 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 ebbfffd1ec..6e93b70ae5 100644
--- a/test/js/samples/css-media-query/expected-bundle.js
+++ b/test/js/samples/css-media-query/expected-bundle.js
@@ -168,7 +168,7 @@ 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 d9af1bfe54..2ff902d897 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 9afe02d871..b49d8c2d0b 100644
--- a/test/js/samples/each-block-changed-check/expected-bundle.js
+++ b/test/js/samples/each-block-changed-check/expected-bundle.js
@@ -288,7 +288,7 @@ 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 6072df4896..28c694359b 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 fa20cbc9ef..6443c745ef 100644
--- a/test/js/samples/event-handlers-custom/expected-bundle.js
+++ b/test/js/samples/event-handlers-custom/expected-bundle.js
@@ -177,7 +177,7 @@ 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 abbfef0f91..a668408648 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 73ac6bcf63..c8c944c266 100644
--- a/test/js/samples/if-block-no-update/expected-bundle.js
+++ b/test/js/samples/if-block-no-update/expected-bundle.js
@@ -223,7 +223,7 @@ 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 e346847b37..9cee168f6b 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 2ce85c33e6..e3685a5f43 100644
--- a/test/js/samples/if-block-simple/expected-bundle.js
+++ b/test/js/samples/if-block-simple/expected-bundle.js
@@ -199,7 +199,7 @@ 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 efd23dc55d..bc0fcd21df 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 c37d2f042a..c37d86bf08 100644
--- a/test/js/samples/non-imported-component/expected-bundle.js
+++ b/test/js/samples/non-imported-component/expected-bundle.js
@@ -169,7 +169,7 @@ 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 195fb2b7b1..604e402d1d 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 eb9a6cdd4f..1b98be5468 100644
--- a/test/js/samples/onrender-onteardown-rewritten/expected-bundle.js
+++ b/test/js/samples/onrender-onteardown-rewritten/expected-bundle.js
@@ -133,7 +133,7 @@ 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 e35b716595..6447e07363 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 6c4e62fa04..039f8c2c95 100644
--- a/test/js/samples/setup-method/expected-bundle.js
+++ b/test/js/samples/setup-method/expected-bundle.js
@@ -144,7 +144,7 @@ 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 3e72768ac8..3089a9cb08 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 = {
@@ -79,4 +79,4 @@ SvelteComponent.prototype.teardown = SvelteComponent.prototype.destroy = functio
 
 template.setup( SvelteComponent );
 
-export default SvelteComponent;
+export default SvelteComponent;
\ No newline at end of file
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 b969e80971..bf134de41f 100644
--- a/test/js/samples/use-elements-as-anchors/expected-bundle.js
+++ b/test/js/samples/use-elements-as-anchors/expected-bundle.js
@@ -383,7 +383,7 @@ 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 046bf7fcbc..b07a8ee99e 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>