From 63e95c2b51d9e9b8b9e15d656c1e11c393277699 Mon Sep 17 00:00:00 2001
From: "Sebastian \"Sebbie\" Silbermann" <sebastian.silbermann@vercel.com>
Date: Wed, 3 Jun 2026 12:00:26 +0200
Subject: [PATCH] [flags] Cleanup `enableActivity` (#36603)

---
 packages/react-reconciler/src/__tests__/Activity-test.js       | 2 --
 packages/react-reconciler/src/__tests__/useEffectEvent-test.js | 1 -
 scripts/jest/TestFlags.js                                      | 2 --
 3 files changed, 5 deletions(-)

diff --git a/packages/react-reconciler/src/__tests__/Activity-test.js b/packages/react-reconciler/src/__tests__/Activity-test.js
index 9abebad1dd09..f34eedf0d735 100644
--- a/packages/react-reconciler/src/__tests__/Activity-test.js
+++ b/packages/react-reconciler/src/__tests__/Activity-test.js
@@ -1527,7 +1527,6 @@ describe('Activity', () => {
     expect(root).toMatchRenderedOutput(<span prop={2} />);
   });
 
-  // @gate enableActivity
   it('getSnapshotBeforeUpdate does not run in hidden trees', async () => {
     let setState;
 
@@ -1607,7 +1606,6 @@ describe('Activity', () => {
     ]);
   });
 
-  // @gate enableActivity
   it('warns if you pass a hidden prop', async () => {
     function App() {
       return (
diff --git a/packages/react-reconciler/src/__tests__/useEffectEvent-test.js b/packages/react-reconciler/src/__tests__/useEffectEvent-test.js
index 1018b4975ad1..89fd240447af 100644
--- a/packages/react-reconciler/src/__tests__/useEffectEvent-test.js
+++ b/packages/react-reconciler/src/__tests__/useEffectEvent-test.js
@@ -1266,7 +1266,6 @@ describe('useEffectEvent', () => {
     assertLog(['ContextReader (Effect event): second']);
   });
 
-  // @gate enableActivity
   it('effect events are fresh inside Activity', async () => {
     function Child({value}) {
       const getValue = useEffectEvent(() => {
diff --git a/scripts/jest/TestFlags.js b/scripts/jest/TestFlags.js
index e2d34cc516d5..067c3b80ae29 100644
--- a/scripts/jest/TestFlags.js
+++ b/scripts/jest/TestFlags.js
@@ -81,8 +81,6 @@ function getTestFlags() {
       fb: www || xplat,
 
       // These aren't flags, just a useful aliases for tests.
-      // TODO: Clean this up.
-      enableActivity: true,
       enableSuspenseList: releaseChannel === 'experimental' || www || xplat,
       enableLegacyHidden: www,
       // TODO: Suspending the work loop during the render phase is currently