diff --git a/packages/next/src/bin/next.ts b/packages/next/src/bin/next.ts
index e95561b5d7555..8acbca5cec0f1 100755
--- a/packages/next/src/bin/next.ts
+++ b/packages/next/src/bin/next.ts
@@ -169,7 +169,6 @@ program
     '--experimental-upload-trace, <traceUrl>',
     'Reports a subset of the debugging trace to a remote HTTP URL. Includes sensitive data.'
   )
-  .addOption(new Option('--experimental-test-proxy').hideHelp())
   .action((directory, options, { _optionValueSources }) => {
     const portSource = _optionValueSources.port
     import('../cli/next-dev.js').then((mod) =>
@@ -313,7 +312,6 @@ program
       'Specify the maximum amount of milliseconds to wait before closing inactive connections.'
     ).argParser(myParseInt)
   )
-  .addOption(new Option('--experimental-test-proxy').hideHelp())
   .action((directory, options) =>
     import('../cli/next-start.js').then((mod) =>
       mod.nextStart(options, directory)
diff --git a/packages/next/src/experimental/testmode/playwright/README.md b/packages/next/src/experimental/testmode/playwright/README.md
index 1034babcd581b..1f31b590f3c59 100644
--- a/packages/next/src/experimental/testmode/playwright/README.md
+++ b/packages/next/src/experimental/testmode/playwright/README.md
@@ -4,6 +4,16 @@
 
 You have a Next.js project.
 
+### Update `next.config.js`
+
+```javascript
+module.exports = {
+  experimental: {
+    testProxy: true,
+  },
+}
+```
+
 ### Install `@playwright/test` in your project
 
 ```sh
@@ -25,7 +35,7 @@ import { defineConfig } from 'next/experimental/testmode/playwright'
 
 export default defineConfig({
   webServer: {
-    command: 'npm dev -- --experimental-test-proxy',
+    command: 'npm dev',
     url: 'http://localhost:3000',
   },
 })