diff --git a/packages/next/src/server/base-server.ts b/packages/next/src/server/base-server.ts
index d8601e571aa94..40afd0988804c 100644
--- a/packages/next/src/server/base-server.ts
+++ b/packages/next/src/server/base-server.ts
@@ -836,10 +836,7 @@ export default abstract class Server<
   ) {
     const [err, req, ctx] = args
 
-    if (
-      process.env.__NEXT_EXPERIMENTAL_INSTRUMENTATION &&
-      this.instrumentation
-    ) {
+    if (this.instrumentation) {
       try {
         await this.instrumentation.onRequestError?.(
           err,
diff --git a/packages/next/src/server/instrumentation/types.ts b/packages/next/src/server/instrumentation/types.ts
index 55ee90632932c..1c260cf79fb4e 100644
--- a/packages/next/src/server/instrumentation/types.ts
+++ b/packages/next/src/server/instrumentation/types.ts
@@ -23,3 +23,7 @@ export type InstrumentationModule = {
   register?(): void
   onRequestError?: InstrumentationOnRequestError
 }
+
+export namespace Instrumentation {
+  export type onRequestError = InstrumentationOnRequestError
+}
diff --git a/packages/next/src/server/web/globals.ts b/packages/next/src/server/web/globals.ts
index 5e5ce7c8e56cc..6c4bf22ef2e8c 100644
--- a/packages/next/src/server/web/globals.ts
+++ b/packages/next/src/server/web/globals.ts
@@ -37,12 +37,7 @@ export async function edgeInstrumentationOnRequestError(
 ) {
   const instrumentation = await getEdgeInstrumentationModule()
   try {
-    if (
-      process.env.__NEXT_EXPERIMENTAL_INSTRUMENTATION &&
-      instrumentation?.onRequestError
-    ) {
-      await instrumentation.onRequestError(...args)
-    }
+    await instrumentation?.onRequestError?.(...args)
   } catch (err) {
     // Log the soft error and continue, since the original error has already been thrown
     console.error('Error in instrumentation.onRequestError:', err)
diff --git a/packages/next/src/types.ts b/packages/next/src/types.ts
index fcb4c47b73cef..396abc74fdb73 100644
--- a/packages/next/src/types.ts
+++ b/packages/next/src/types.ts
@@ -38,6 +38,8 @@ export type {
   ResolvedViewport,
 } from './lib/metadata/types/metadata-interface'
 
+export type { Instrumentation } from './server/instrumentation/types'
+
 /**
  * Stub route type for typedRoutes before `next dev` or `next build` is run
  * @link https://nextjs.org/docs/app/building-your-application/configuring/typescript#statically-typed-links
diff --git a/test/e2e/on-request-error/basic/basic.test.ts b/test/e2e/on-request-error/basic/basic.test.ts
index 3e018fbf84037..0af57ce7077a9 100644
--- a/test/e2e/on-request-error/basic/basic.test.ts
+++ b/test/e2e/on-request-error/basic/basic.test.ts
@@ -6,9 +6,6 @@ describe('on-request-error - basic', () => {
   const { next, skipped } = nextTestSetup({
     files: __dirname,
     skipDeployment: true,
-    env: {
-      __NEXT_EXPERIMENTAL_INSTRUMENTATION: '1',
-    },
   })
 
   if (skipped) {
diff --git a/test/e2e/on-request-error/basic/instrumentation.js b/test/e2e/on-request-error/basic/instrumentation.ts
similarity index 54%
rename from test/e2e/on-request-error/basic/instrumentation.js
rename to test/e2e/on-request-error/basic/instrumentation.ts
index b9944b351236c..6310bffac27fc 100644
--- a/test/e2e/on-request-error/basic/instrumentation.js
+++ b/test/e2e/on-request-error/basic/instrumentation.ts
@@ -1,8 +1,14 @@
-export function onRequestError(err, request, context) {
+import { type Instrumentation } from 'next'
+
+export const onRequestError: Instrumentation.onRequestError = (
+  err,
+  request,
+  context
+) => {
   fetch(`http://localhost:${process.env.PORT}/write-log`, {
     method: 'POST',
     body: JSON.stringify({
-      message: err.message,
+      message: (err as Error).message,
       request,
       context,
     }),
diff --git a/test/e2e/on-request-error/dynamic-routes/dynamic-routes.test.ts b/test/e2e/on-request-error/dynamic-routes/dynamic-routes.test.ts
index d2f0e98a02379..a4983de82ea10 100644
--- a/test/e2e/on-request-error/dynamic-routes/dynamic-routes.test.ts
+++ b/test/e2e/on-request-error/dynamic-routes/dynamic-routes.test.ts
@@ -6,9 +6,6 @@ describe('on-request-error - dynamic-routes', () => {
   const { next, skipped } = nextTestSetup({
     files: __dirname,
     skipDeployment: true,
-    env: {
-      __NEXT_EXPERIMENTAL_INSTRUMENTATION: '1',
-    },
   })
 
   if (skipped) {
diff --git a/test/e2e/on-request-error/server-action-error/server-action-error.test.ts b/test/e2e/on-request-error/server-action-error/server-action-error.test.ts
index b092494fcfc7a..33f45afa9e652 100644
--- a/test/e2e/on-request-error/server-action-error/server-action-error.test.ts
+++ b/test/e2e/on-request-error/server-action-error/server-action-error.test.ts
@@ -6,9 +6,6 @@ describe('on-request-error - server-action-error', () => {
   const { next, skipped } = nextTestSetup({
     files: __dirname,
     skipDeployment: true,
-    env: {
-      __NEXT_EXPERIMENTAL_INSTRUMENTATION: '1',
-    },
   })
 
   if (skipped) {
diff --git a/test/e2e/on-request-error/skip-next-internal-error/skip-next-internal-error.test.ts b/test/e2e/on-request-error/skip-next-internal-error/skip-next-internal-error.test.ts
index de8016c020e39..b34f2e4a1c7c5 100644
--- a/test/e2e/on-request-error/skip-next-internal-error/skip-next-internal-error.test.ts
+++ b/test/e2e/on-request-error/skip-next-internal-error/skip-next-internal-error.test.ts
@@ -4,9 +4,6 @@ describe('on-request-error - skip-next-internal-error', () => {
   const { next, skipped } = nextTestSetup({
     files: __dirname,
     skipDeployment: true,
-    env: {
-      __NEXT_EXPERIMENTAL_INSTRUMENTATION: '1',
-    },
   })
 
   if (skipped) {