diff --git a/package.json b/package.json
index 674c3a7011..d800820788 100644
--- a/package.json
+++ b/package.json
@@ -43,14 +43,14 @@
     "test:e2e:build": "vite build --config test/e2e/vite.config.mjs",
     "test:e2e:dev": "vite --config test/e2e/vite.config.mjs -l info",
     "test:e2e:run": "cross-env VITEST_ENV=chromium vitest --project e2e",
-    "test:e2e:server": "serve test/e2e -p 5001",
+    "test:e2e:server": "serve test/e2e -p 5173",
     "test:karma": "cross-env NODE_ENV=test karma start test/karma.conf.js",
     "test:karma:profile": "cross-env NODE_ENV=test karma start test/karma.conf.profile.js",
     "test:regressions": "cross-env NODE_ENV=production pnpm test:regressions:build && concurrently --success first --kill-others \"pnpm test:regressions:run\" \"pnpm test:regressions:server\"",
     "test:regressions:build": "vite build --config test/regressions/vite.config.mjs",
     "test:regressions:dev": "vite --config test/regressions/vite.config.mjs",
     "test:regressions:run": "cross-env VITEST_ENV=chromium vitest --project regressions",
-    "test:regressions:server": "serve test/regressions -p 5001",
+    "test:regressions:server": "serve test/regressions -p 5173",
     "test:unit": "cross-env NODE_ENV=test mocha 'packages/**/*.test.{js,ts,tsx}' 'docs/**/*.test.{js,ts,tsx}'",
     "test:jsdom": "cross-env NODE_ENV=test VITEST_ENV=jsdom vitest --project @base-ui-components/react --project docs",
     "test:chromium": "cross-env NODE_ENV=test VITEST_ENV=chromium vitest --project @base-ui-components/react --project docs",
diff --git a/test/README.md b/test/README.md
index 0304aaf8af..c26ee2aa0c 100644
--- a/test/README.md
+++ b/test/README.md
@@ -200,7 +200,7 @@ You can pass the same arguments as you could to `mocha`.
 For example, `pnpm test:regressions:run --watch --grep "docs-system-basic"` to take new screenshots of every demo in `docs/src/pages/system/basic`.
 You can view the screenshots in `test/regressions/screenshots/chrome`.
 
-Alternatively, you might want to open `http://localhost:5001` (while `pnpm test:regressions:dev` is running) to view individual views separately.
+Alternatively, you might want to open `http://localhost:5173` (while `pnpm test:regressions:dev` is running) to view individual views separately.
 
 ### Caveats
 
diff --git a/test/e2e/index.test.ts b/test/e2e/index.test.ts
index f5693af5dc..efbd9bba45 100644
--- a/test/e2e/index.test.ts
+++ b/test/e2e/index.test.ts
@@ -11,7 +11,7 @@ import type {
 import '@mui/internal-test-utils/initMatchers';
 import '@mui/internal-test-utils/initPlaywrightMatchers';
 
-const BASE_URL = 'http://localhost:5001';
+const BASE_URL = 'http://localhost:5173';
 
 function sleep(duration: number): Promise<void> {
   return new Promise<void>((resolve) => {
diff --git a/test/regressions/index.test.ts b/test/regressions/index.test.ts
index 9cbe9289b9..b864cc00da 100644
--- a/test/regressions/index.test.ts
+++ b/test/regressions/index.test.ts
@@ -3,7 +3,7 @@ import * as fse from 'fs-extra';
 import * as playwright from 'playwright';
 import { describe, it } from 'vitest';
 
-const baseUrl = 'http://localhost:5001';
+const baseUrl = 'http://localhost:5173';
 const screenshotDir = path.resolve(__dirname, './screenshots/chrome');
 
 const browser = await playwright.chromium.launch({