diff --git a/tests/legacy-cli/e2e/tests/vite/ssr-new-dep-optimization.ts b/tests/legacy-cli/e2e/tests/vite/ssr-new-dep-optimization.ts
index d330cbf8f75d..d8e9d61f79e2 100644
--- a/tests/legacy-cli/e2e/tests/vite/ssr-new-dep-optimization.ts
+++ b/tests/legacy-cli/e2e/tests/vite/ssr-new-dep-optimization.ts
@@ -1,5 +1,4 @@
 import assert from 'node:assert';
-import { setTimeout } from 'node:timers/promises';
 import { ng, waitForAnyProcessOutputToMatch } from '../../utils/process';
 import { installWorkspacePackages, uninstallPackage } from '../../utils/packages';
 import { ngServe, useSha } from '../../utils/project';
@@ -25,17 +24,18 @@ export default async function () {
   const port = await ngServe();
   await validateResponse('/', /Hello,/);
 
-  const appConfigContentsUpdated = `
-    import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
-    ${(await readFile('src/app/app.config.ts')).replace('provideRouter(routes),', 'provideAnimationsAsync(), provideRouter(routes),')}
-  `;
-
   await Promise.all([
     waitForAnyProcessOutputToMatch(
       /new dependencies optimized: @angular\/platform-browser\/animations\/async/,
       6000,
     ),
-    setTimeout(200).then(() => writeFile('src/app/app.config.ts', appConfigContentsUpdated)),
+    writeFile(
+      'src/app/app.config.ts',
+      `
+      import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
+      ${(await readFile('src/app/app.config.ts')).replace('provideRouter(routes),', 'provideAnimationsAsync(), provideRouter(routes),')}
+    `,
+    ),
   ]);
 
   // Verify the app still works.