diff --git a/test/runtime-puppeteer/samples/style_manager-cleanup/_config.js b/test/runtime-puppeteer/samples/style_manager-cleanup/_config.js
index b3a5a97e45..47d7dee83f 100644
--- a/test/runtime-puppeteer/samples/style_manager-cleanup/_config.js
+++ b/test/runtime-puppeteer/samples/style_manager-cleanup/_config.js
@@ -5,12 +5,12 @@ export default {
 	test: async ({ component, assert, window, waitUntil }) => {
 		assert.htmlEqual(window.document.head.innerHTML, '');
 		component.visible = true;
-		assert.htmlEqual(window.document.head.innerHTML, '<style></style>');
+		assert.htmlEqual(window.document.head.innerHTML, '<style>/* empty */</style>');
 		await waitUntil(() => window.document.head.innerHTML === '');
 		assert.htmlEqual(window.document.head.innerHTML, '');
 
 		component.visible = false;
-		assert.htmlEqual(window.document.head.innerHTML, '<style></style>');
+		assert.htmlEqual(window.document.head.innerHTML, '<style>/* empty */</style>');
 		await waitUntil(() => window.document.head.innerHTML === '');
 		assert.htmlEqual(window.document.head.innerHTML, '');
 	}
diff --git a/test/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte b/test/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte
index ffaeb2c097..325841373f 100644
--- a/test/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte
+++ b/test/validator/samples/general-siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte
@@ -1,4 +1,4 @@
-<svelte:options tag="my-element" />
+<svelte:options customElement="my-element" />
 
 <h1>Heading 1</h1>
 <span>Span 1</span>
diff --git a/test/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte b/test/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte
index 1d98415321..faf34125b1 100644
--- a/test/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte
+++ b/test/validator/samples/siblings-combinator-in-custom-element-selects-slot-fallback/input.svelte
@@ -1,4 +1,4 @@
-<svelte:options tag="custom-element" />
+<svelte:options customElement="custom-element" />
 
 <h1>test</h1>
 <slot>