diff --git a/packages/next/test/fixtures/00-app-dir/app/client-component-route/page.client.js b/packages/next/test/fixtures/00-app-dir/app/client-component-route/page.client.js
index c39f1587483..304f821f512 100644
--- a/packages/next/test/fixtures/00-app-dir/app/client-component-route/page.client.js
+++ b/packages/next/test/fixtures/00-app-dir/app/client-component-route/page.client.js
@@ -1,3 +1,5 @@
+'client';
+
 import { useState, useEffect } from 'react';
 
 import style from './style.module.css';
diff --git a/packages/next/test/fixtures/00-app-dir/app/client-nested/layout.client.js b/packages/next/test/fixtures/00-app-dir/app/client-nested/layout.client.js
index 696c4c691d2..c62e96b3306 100644
--- a/packages/next/test/fixtures/00-app-dir/app/client-nested/layout.client.js
+++ b/packages/next/test/fixtures/00-app-dir/app/client-nested/layout.client.js
@@ -1,3 +1,5 @@
+'client';
+
 import { useState, useEffect } from 'react';
 
 import styles from './style.module.css';
diff --git a/packages/next/test/fixtures/00-app-dir/app/dashboard/index/lazy.client.js b/packages/next/test/fixtures/00-app-dir/app/dashboard/index/lazy.client.js
index 68469d2baa9..cbeb21e2454 100644
--- a/packages/next/test/fixtures/00-app-dir/app/dashboard/index/lazy.client.js
+++ b/packages/next/test/fixtures/00-app-dir/app/dashboard/index/lazy.client.js
@@ -1,3 +1,5 @@
+'client';
+
 export default function LazyComponent() {
   return (
     <>
diff --git a/packages/next/test/fixtures/00-app-dir/app/dashboard/index/test.client.js b/packages/next/test/fixtures/00-app-dir/app/dashboard/index/test.client.js
index 35a671c52a7..55dfd9ed4bc 100644
--- a/packages/next/test/fixtures/00-app-dir/app/dashboard/index/test.client.js
+++ b/packages/next/test/fixtures/00-app-dir/app/dashboard/index/test.client.js
@@ -1,3 +1,5 @@
+'client';
+
 import { useState, lazy } from 'react';
 
 const Lazy = lazy(() => import('./lazy.client.js'));
diff --git a/packages/next/test/fixtures/00-app-dir/app/should-not-serve-client/page.client.js b/packages/next/test/fixtures/00-app-dir/app/should-not-serve-client/page.client.js
index 0c661bebe82..bc8a27d2e93 100644
--- a/packages/next/test/fixtures/00-app-dir/app/should-not-serve-client/page.client.js
+++ b/packages/next/test/fixtures/00-app-dir/app/should-not-serve-client/page.client.js
@@ -1,3 +1,5 @@
+'client';
+
 export default function ShouldNotServeClientDotJs(props) {
   return (
     <>