diff --git a/packages/svelte/tests/custom-renderers/renderer.js b/packages/svelte/tests/custom-renderers/renderer.js
index 6141242ded..cec57ccc53 100644
--- a/packages/svelte/tests/custom-renderers/renderer.js
+++ b/packages/svelte/tests/custom-renderers/renderer.js
@@ -176,10 +176,10 @@ const renderer = createRenderer({
 
 /**
  * Create a root object for mounting components into.
- * @returns {ObjElement}
+ * @returns {ObjFragment}
  */
 export function create_root() {
-	return renderer.createElement('root');
+	return renderer.createFragment();
 }
 
 /**
diff --git a/packages/svelte/tests/custom-renderers/samples/attributes/_config.js b/packages/svelte/tests/custom-renderers/samples/attributes/_config.js
index 318378d0d8..448b8adc26 100644
--- a/packages/svelte/tests/custom-renderers/samples/attributes/_config.js
+++ b/packages/svelte/tests/custom-renderers/samples/attributes/_config.js
@@ -5,7 +5,7 @@ export default test({
 		const html = serialize(target);
 		assert.equal(
 			html,
-			'<root><div class="container" data-color="red"><span id="label">colored</span></div></root>'
+			'<div class="container" data-color="red"><span id="label">colored</span></div>'
 		);
 
 		// Verify individual attribute access on the object node
diff --git a/packages/svelte/tests/custom-renderers/samples/boundary-pending/_config.js b/packages/svelte/tests/custom-renderers/samples/boundary-pending/_config.js
index cd30fba5f2..ad126e3e0d 100644
--- a/packages/svelte/tests/custom-renderers/samples/boundary-pending/_config.js
+++ b/packages/svelte/tests/custom-renderers/samples/boundary-pending/_config.js
@@ -25,9 +25,6 @@ export default test({
 		flushSync();
 
 		const html = serialize(target);
-		assert.equal(
-			html,
-			'<root><p>hello</p> <p>Something inside</p> <p>Something outside</p></root>'
-		);
+		assert.equal(html, '<p>hello</p> <p>Something inside</p> <p>Something outside</p>');
 	}
 });
diff --git a/packages/svelte/tests/custom-renderers/samples/conditional-rendering/_config.js b/packages/svelte/tests/custom-renderers/samples/conditional-rendering/_config.js
index 9538a019c3..61f68fa1ca 100644
--- a/packages/svelte/tests/custom-renderers/samples/conditional-rendering/_config.js
+++ b/packages/svelte/tests/custom-renderers/samples/conditional-rendering/_config.js
@@ -13,12 +13,12 @@ export default test({
 		flushSync();
 
 		let html = serialize(target);
-		assert.equal(html, '<root><p>hidden</p> <button>toggle</button></root>');
+		assert.equal(html, '<p>hidden</p> <button>toggle</button>');
 
 		dispatch_event(button, 'click');
 		flushSync();
 
 		html = serialize(target);
-		assert.equal(html, '<root><p>visible</p> <button>toggle</button></root>');
+		assert.equal(html, '<p>visible</p> <button>toggle</button>');
 	}
 });
diff --git a/packages/svelte/tests/custom-renderers/samples/event-handler/_config.js b/packages/svelte/tests/custom-renderers/samples/event-handler/_config.js
index 013a983464..bae32a7474 100644
--- a/packages/svelte/tests/custom-renderers/samples/event-handler/_config.js
+++ b/packages/svelte/tests/custom-renderers/samples/event-handler/_config.js
@@ -13,13 +13,13 @@ export default test({
 		flushSync();
 
 		const html = serialize(target);
-		assert.equal(html, '<root><button>click me</button> <p>1</p></root>');
+		assert.equal(html, '<button>click me</button> <p>1</p>');
 
 		dispatch_event(button, 'click');
 		dispatch_event(button, 'click');
 		flushSync();
 
 		const html2 = serialize(target);
-		assert.equal(html2, '<root><button>click me</button> <p>3</p></root>');
+		assert.equal(html2, '<button>click me</button> <p>3</p>');
 	}
 });
diff --git a/packages/svelte/tests/custom-renderers/samples/reactive-state/_config.js b/packages/svelte/tests/custom-renderers/samples/reactive-state/_config.js
index 82a8a02a64..dffe3ba56d 100644
--- a/packages/svelte/tests/custom-renderers/samples/reactive-state/_config.js
+++ b/packages/svelte/tests/custom-renderers/samples/reactive-state/_config.js
@@ -13,6 +13,6 @@ export default test({
 		flushSync();
 
 		const html = serialize(target);
-		assert.equal(html, '<root><button>clicks: 1</button></root>');
+		assert.equal(html, '<button>clicks: 1</button>');
 	}
 });
diff --git a/packages/svelte/tests/custom-renderers/shared.ts b/packages/svelte/tests/custom-renderers/shared.ts
index fa7e1fb0e9..7f98895863 100644
--- a/packages/svelte/tests/custom-renderers/shared.ts
+++ b/packages/svelte/tests/custom-renderers/shared.ts
@@ -129,7 +129,7 @@ async function run_test(cwd: string, config: CustomRendererTest, compile_options
 
 		if (config.html) {
 			const html = serialize(target);
-			assert.equal(html, `<root>${config.html}</root>`);
+			assert.equal(html, config.html);
 		}
 
 		try {
@@ -160,11 +160,7 @@ async function run_test(cwd: string, config: CustomRendererTest, compile_options
 
 			// After unmount the target should be empty (only comments remain, which serialize to '')
 			const remaining = serialize(target);
-			assert.equal(
-				remaining,
-				'<root></root>',
-				'Expected component to leave nothing behind after unmount'
-			);
+			assert.equal(remaining, '', 'Expected component to leave nothing behind after unmount');
 		}
 	} catch (err) {
 		if (config.runtime_error) {