diff --git a/tests/components/ct-react-vite/src/assets/index.css b/tests/components/ct-react-vite/src/assets/index.css
index ec2585e8c0..97495c44b8 100644
--- a/tests/components/ct-react-vite/src/assets/index.css
+++ b/tests/components/ct-react-vite/src/assets/index.css
@@ -11,3 +11,10 @@ code {
   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
     monospace;
 }
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-react/src/assets/index.css b/tests/components/ct-react/src/assets/index.css
index ec2585e8c0..97495c44b8 100644
--- a/tests/components/ct-react/src/assets/index.css
+++ b/tests/components/ct-react/src/assets/index.css
@@ -11,3 +11,10 @@ code {
   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
     monospace;
 }
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-solid/src/assets/index.css b/tests/components/ct-solid/src/assets/index.css
index ec2585e8c0..97495c44b8 100644
--- a/tests/components/ct-solid/src/assets/index.css
+++ b/tests/components/ct-solid/src/assets/index.css
@@ -11,3 +11,10 @@ code {
   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
     monospace;
 }
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-solid/src/index.tsx b/tests/components/ct-solid/src/index.tsx
index 1cb0a23d38..9ad9412423 100644
--- a/tests/components/ct-solid/src/index.tsx
+++ b/tests/components/ct-solid/src/index.tsx
@@ -1,7 +1,6 @@
 /* @refresh reload */
 import { render } from 'solid-js/web';
-
-import './assets/index.css';
 import App from './App';
+import './assets/index.css';
 
 render(() => <App />, document.getElementById('root') as HTMLElement);
diff --git a/tests/components/ct-svelte-vite/playwright/index.ts b/tests/components/ct-svelte-vite/playwright/index.ts
index 2cc871dee0..17487c90a3 100644
--- a/tests/components/ct-svelte-vite/playwright/index.ts
+++ b/tests/components/ct-svelte-vite/playwright/index.ts
@@ -1,5 +1,5 @@
 //@ts-check
-
+import '../src/assets/index.css';
 import { beforeMount, afterMount } from '@playwright/experimental-ct-svelte/hooks';
 
 beforeMount(async ({ hooksConfig }) => {
diff --git a/tests/components/ct-svelte-vite/src/assets/index.css b/tests/components/ct-svelte-vite/src/assets/index.css
new file mode 100644
index 0000000000..97495c44b8
--- /dev/null
+++ b/tests/components/ct-svelte-vite/src/assets/index.css
@@ -0,0 +1,20 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-svelte-vite/src/main.ts b/tests/components/ct-svelte-vite/src/main.ts
index aa7431f21e..ca8aaba9be 100644
--- a/tests/components/ct-svelte-vite/src/main.ts
+++ b/tests/components/ct-svelte-vite/src/main.ts
@@ -1,4 +1,5 @@
 import App from './App.svelte';
+import './assets/index.css';
 
 const app = new App({
   target: document.getElementById('app')
diff --git a/tests/components/ct-svelte/playwright/index.ts b/tests/components/ct-svelte/playwright/index.ts
index d3a5d6623b..33958be194 100644
--- a/tests/components/ct-svelte/playwright/index.ts
+++ b/tests/components/ct-svelte/playwright/index.ts
@@ -1,4 +1,5 @@
 //@ts-check
+import '../src/assets/index.css';
 import { beforeMount, afterMount } from '@playwright/experimental-ct-svelte/hooks';
 
 beforeMount(async ({ hooksConfig }) => {
diff --git a/tests/components/ct-svelte/public/global.css b/tests/components/ct-svelte/public/global.css
deleted file mode 100644
index 0600f6820b..0000000000
--- a/tests/components/ct-svelte/public/global.css
+++ /dev/null
@@ -1,63 +0,0 @@
-html, body {
-  position: relative;
-  width: 100%;
-  height: 100%;
-}
-
-body {
-  color: #333;
-  margin: 0;
-  padding: 8px;
-  box-sizing: border-box;
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
-}
-
-a {
-  color: rgb(0,100,200);
-  text-decoration: none;
-}
-
-a:hover {
-  text-decoration: underline;
-}
-
-a:visited {
-  color: rgb(0,80,160);
-}
-
-label {
-  display: block;
-}
-
-input, button, select, textarea {
-  font-family: inherit;
-  font-size: inherit;
-  -webkit-padding: 0.4em 0;
-  padding: 0.4em;
-  margin: 0 0 0.5em 0;
-  box-sizing: border-box;
-  border: 1px solid #ccc;
-  border-radius: 2px;
-}
-
-input:disabled {
-  color: #ccc;
-}
-
-button {
-  color: #333;
-  background-color: #f4f4f4;
-  outline: none;
-}
-
-button:disabled {
-  color: #999;
-}
-
-button:not(:disabled):active {
-  background-color: #ddd;
-}
-
-button:focus {
-  border-color: #666;
-}
diff --git a/tests/components/ct-svelte/public/index.html b/tests/components/ct-svelte/public/index.html
index 471debaf03..74558940d0 100644
--- a/tests/components/ct-svelte/public/index.html
+++ b/tests/components/ct-svelte/public/index.html
@@ -7,7 +7,6 @@
   <title>Svelte app</title>
 
   <link rel='icon' type='image/png' href='/favicon.png'>
-  <link rel='stylesheet' href='/global.css'>
   <link rel='stylesheet' href='/build/bundle.css'>
 
   <script defer src='/build/bundle.js'></script>
diff --git a/tests/components/ct-svelte/src/assets/index.css b/tests/components/ct-svelte/src/assets/index.css
new file mode 100644
index 0000000000..97495c44b8
--- /dev/null
+++ b/tests/components/ct-svelte/src/assets/index.css
@@ -0,0 +1,20 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-svelte/src/main.js b/tests/components/ct-svelte/src/main.js
index 8e1efe955c..d5e74d2004 100644
--- a/tests/components/ct-svelte/src/main.js
+++ b/tests/components/ct-svelte/src/main.js
@@ -1,4 +1,5 @@
 import App from './App.svelte';
+import './assets/index.css';
 
 const app = new App({
   target: document.body,
diff --git a/tests/components/ct-vue-cli/playwright/index.js b/tests/components/ct-vue-cli/playwright/index.js
index 29eaab5a6a..2139a9c94e 100644
--- a/tests/components/ct-vue-cli/playwright/index.js
+++ b/tests/components/ct-vue-cli/playwright/index.js
@@ -1,5 +1,5 @@
 //@ts-check
-
+import '../src/assets/index.css';
 import { beforeMount, afterMount } from '@playwright/experimental-ct-vue/hooks';
 
 beforeMount(async ({ app, hooksConfig }) => {
diff --git a/tests/components/ct-vue-cli/src/assets/index.css b/tests/components/ct-vue-cli/src/assets/index.css
new file mode 100644
index 0000000000..97495c44b8
--- /dev/null
+++ b/tests/components/ct-vue-cli/src/assets/index.css
@@ -0,0 +1,20 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-vue-cli/src/main.js b/tests/components/ct-vue-cli/src/main.js
index 01433bca2a..d25dbd8b42 100644
--- a/tests/components/ct-vue-cli/src/main.js
+++ b/tests/components/ct-vue-cli/src/main.js
@@ -1,4 +1,5 @@
 import { createApp } from 'vue'
 import App from './App.vue'
+import './assets/index.css'; 
 
 createApp(App).mount('#app')
diff --git a/tests/components/ct-vue-vite/playwright/index.js b/tests/components/ct-vue-vite/playwright/index.js
index e08043798b..2139a9c94e 100644
--- a/tests/components/ct-vue-vite/playwright/index.js
+++ b/tests/components/ct-vue-vite/playwright/index.js
@@ -1,4 +1,5 @@
 //@ts-check
+import '../src/assets/index.css';
 import { beforeMount, afterMount } from '@playwright/experimental-ct-vue/hooks';
 
 beforeMount(async ({ app, hooksConfig }) => {
diff --git a/tests/components/ct-vue-vite/src/assets/index.css b/tests/components/ct-vue-vite/src/assets/index.css
new file mode 100644
index 0000000000..97495c44b8
--- /dev/null
+++ b/tests/components/ct-vue-vite/src/assets/index.css
@@ -0,0 +1,20 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-vue-vite/src/main.js b/tests/components/ct-vue-vite/src/main.js
index 01433bca2a..719495a2f2 100644
--- a/tests/components/ct-vue-vite/src/main.js
+++ b/tests/components/ct-vue-vite/src/main.js
@@ -1,4 +1,5 @@
 import { createApp } from 'vue'
 import App from './App.vue'
+import './assets/index.css';
 
 createApp(App).mount('#app')
diff --git a/tests/components/ct-vue2-cli/playwright/index.js b/tests/components/ct-vue2-cli/playwright/index.js
index 8d96634b19..966d595c23 100644
--- a/tests/components/ct-vue2-cli/playwright/index.js
+++ b/tests/components/ct-vue2-cli/playwright/index.js
@@ -1,5 +1,5 @@
 //@ts-check
-
+import '../src/assets/index.css';
 import { beforeMount, afterMount } from '@playwright/experimental-ct-vue2/hooks';
 
 beforeMount(async ({ hooksConfig }) => {
diff --git a/tests/components/ct-vue2-cli/src/assets/index.css b/tests/components/ct-vue2-cli/src/assets/index.css
new file mode 100644
index 0000000000..97495c44b8
--- /dev/null
+++ b/tests/components/ct-vue2-cli/src/assets/index.css
@@ -0,0 +1,20 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #e3e3e3;
+    background-color: #1b1b1d;
+  }
+}
diff --git a/tests/components/ct-vue2-cli/src/main.js b/tests/components/ct-vue2-cli/src/main.js
index 63eb05f711..b9840f5446 100644
--- a/tests/components/ct-vue2-cli/src/main.js
+++ b/tests/components/ct-vue2-cli/src/main.js
@@ -1,5 +1,6 @@
 import Vue from 'vue'
 import App from './App.vue'
+import './assets/index.css';
 
 Vue.config.productionTip = false