diff --git a/packages/react-dom/src/__tests__/ReactDOMFiberAsync-test.js b/packages/react-dom/src/__tests__/ReactDOMFiberAsync-test.js
index 4b99fa19303ac..d9ecced72e8a6 100644
--- a/packages/react-dom/src/__tests__/ReactDOMFiberAsync-test.js
+++ b/packages/react-dom/src/__tests__/ReactDOMFiberAsync-test.js
@@ -286,7 +286,7 @@ describe('ReactDOMFiberAsync', () => {
       expect(ops).toEqual(['BC', 'ABCD']);
     });
 
-    // @gate experimental
+    // @gate experimental || www
     it('flushControlled flushes updates before yielding to browser', () => {
       let inst;
       class Counter extends React.Component {
@@ -326,7 +326,7 @@ describe('ReactDOMFiberAsync', () => {
       ]);
     });
 
-    // @gate experimental
+    // @gate experimental || www
     it('flushControlled does not flush until end of outermost batchedUpdates', () => {
       let inst;
       class Counter extends React.Component {
@@ -357,7 +357,7 @@ describe('ReactDOMFiberAsync', () => {
       ]);
     });
 
-    // @gate experimental
+    // @gate experimental || www
     it('flushControlled returns nothing', () => {
       // In the future, we may want to return a thenable "work" object.
       let inst;
diff --git a/packages/react-dom/src/__tests__/ReactDOMServerPartialHydration-test.internal.js b/packages/react-dom/src/__tests__/ReactDOMServerPartialHydration-test.internal.js
index 65ae9219e747f..8e3c99ccc283c 100644
--- a/packages/react-dom/src/__tests__/ReactDOMServerPartialHydration-test.internal.js
+++ b/packages/react-dom/src/__tests__/ReactDOMServerPartialHydration-test.internal.js
@@ -571,7 +571,7 @@ describe('ReactDOMServerPartialHydration', () => {
     expect(span.className).toBe('hi');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('blocks updates to hydrate the content first if props changed at idle priority', async () => {
     let suspend = false;
     let resolve;
@@ -1498,7 +1498,7 @@ describe('ReactDOMServerPartialHydration', () => {
     expect(container.textContent).toBe('ALoading B');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('clears server boundaries when SuspenseList runs out of time hydrating', async () => {
     let suspend = false;
     let resolve;
@@ -1912,7 +1912,7 @@ describe('ReactDOMServerPartialHydration', () => {
     document.body.removeChild(container);
   });
 
-  // @gate experimental
+  // @gate www
   it('does not invoke an event on a hydrated event handle until it commits', async () => {
     const setClick = ReactDOM.unstable_createEventHandle('click');
     let suspend = false;
@@ -2077,7 +2077,7 @@ describe('ReactDOMServerPartialHydration', () => {
     document.body.removeChild(container);
   });
 
-  // @gate experimental
+  // @gate www
   it('invokes discrete events on nested suspense boundaries in a root (createEventHandle)', async () => {
     let suspend = false;
     let isServerRendering = true;
@@ -2617,7 +2617,7 @@ describe('ReactDOMServerPartialHydration', () => {
     expect(span.innerHTML).toBe('Hidden child');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('renders a hidden LegacyHidden component inside a Suspense boundary', async () => {
     const ref = React.createRef();
 
@@ -2646,7 +2646,7 @@ describe('ReactDOMServerPartialHydration', () => {
     expect(span.innerHTML).toBe('Hidden child');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('renders a visible LegacyHidden component', async () => {
     const ref = React.createRef();
 
diff --git a/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js b/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js
index d8b6598a78639..73269b2262e51 100644
--- a/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js
+++ b/packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js
@@ -369,7 +369,7 @@ describe('ReactDOMServerSelectiveHydration', () => {
     document.body.removeChild(container);
   });
 
-  // @gate experimental
+  // @gate www
   it('hydrates the target boundary synchronously during a click (createEventHandle)', async () => {
     const setClick = ReactDOM.unstable_createEventHandle('click');
     let isServerRendering = true;
@@ -438,7 +438,7 @@ describe('ReactDOMServerSelectiveHydration', () => {
     document.body.removeChild(container);
   });
 
-  // @gate experimental
+  // @gate www
   it('hydrates at higher pri if sync did not work first time (createEventHandle)', async () => {
     let suspend = false;
     let isServerRendering = true;
@@ -526,7 +526,7 @@ describe('ReactDOMServerSelectiveHydration', () => {
     document.body.removeChild(container);
   });
 
-  // @gate experimental
+  // @gate www
   it('hydrates at higher pri for secondary discrete events (createEventHandle)', async () => {
     const setClick = ReactDOM.unstable_createEventHandle('click');
     let suspend = false;
@@ -812,7 +812,7 @@ describe('ReactDOMServerSelectiveHydration', () => {
     document.body.removeChild(container);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('hydrates the last explicitly hydrated target at higher priority', async () => {
     function Child({text}) {
       Scheduler.unstable_yieldValue(text);
@@ -861,7 +861,7 @@ describe('ReactDOMServerSelectiveHydration', () => {
     expect(Scheduler).toFlushAndYield(['App', 'C', 'B', 'A']);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('hydrates before an update even if hydration moves away from it', async () => {
     function Child({text}) {
       Scheduler.unstable_yieldValue(text);
diff --git a/packages/react-dom/src/__tests__/ReactDOMTestSelectors-test.internal.js b/packages/react-dom/src/__tests__/ReactDOMTestSelectors-test.internal.js
index 20fe21a73b4ca..24c3978566a01 100644
--- a/packages/react-dom/src/__tests__/ReactDOMTestSelectors-test.internal.js
+++ b/packages/react-dom/src/__tests__/ReactDOMTestSelectors-test.internal.js
@@ -56,6 +56,7 @@ describe('ReactDOMTestSelectors', () => {
   });
 
   describe('findAllNodes', () => {
+    // @gate www
     it('should support searching from the document root', () => {
       function Example() {
         return (
@@ -75,6 +76,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match');
     });
 
+    // @gate www
     it('should support searching from the container', () => {
       function Example() {
         return (
@@ -94,6 +96,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match');
     });
 
+    // @gate www
     it('should support searching from a previous match if the match had a data-testname', () => {
       function Outer() {
         return (
@@ -124,6 +127,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('inner');
     });
 
+    // @gate www
     it('should not support searching from a previous match if the match did not have a data-testname', () => {
       function Outer() {
         return (
@@ -153,6 +157,7 @@ describe('ReactDOMTestSelectors', () => {
       );
     });
 
+    // @gate www
     it('should support an multiple component types in the selector array', () => {
       function Outer() {
         return (
@@ -206,6 +211,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match3');
     });
 
+    // @gate www
     it('should find multiple matches', () => {
       function Example1() {
         return (
@@ -243,6 +249,7 @@ describe('ReactDOMTestSelectors', () => {
       ]);
     });
 
+    // @gate www
     it('should ignore nested matches', () => {
       function Example() {
         return (
@@ -262,6 +269,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toEqual('match1');
     });
 
+    // @gate www
     it('should enforce the specific order of selectors', () => {
       function Outer() {
         return (
@@ -286,6 +294,7 @@ describe('ReactDOMTestSelectors', () => {
       ).toHaveLength(0);
     });
 
+    // @gate www
     it('should not search within hidden subtrees', () => {
       const ref1 = React.createRef(null);
       const ref2 = React.createRef(null);
@@ -315,6 +324,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0]).toBe(ref2.current);
     });
 
+    // @gate www
     it('should support filtering by display text', () => {
       function Example() {
         return (
@@ -337,6 +347,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match');
     });
 
+    // @gate www
     it('should support filtering by explicit accessibiliy role', () => {
       function Example() {
         return (
@@ -361,6 +372,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match');
     });
 
+    // @gate www
     it('should support filtering by explicit secondary accessibiliy role', () => {
       const ref = React.createRef();
 
@@ -385,6 +397,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0]).toBe(ref.current);
     });
 
+    // @gate www
     it('should support filtering by implicit accessibiliy role', () => {
       function Example() {
         return (
@@ -407,6 +420,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match');
     });
 
+    // @gate www
     it('should support filtering by implicit accessibiliy role with attributes qualifications', () => {
       function Example() {
         return (
@@ -429,6 +443,7 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match');
     });
 
+    // @gate www
     it('should support searching ahead with the has() selector', () => {
       function Example() {
         return (
@@ -464,12 +479,14 @@ describe('ReactDOMTestSelectors', () => {
       expect(matches[0].id).toBe('match');
     });
 
+    // @gate www
     it('should throw if no container can be found', () => {
       expect(() => findAllNodes(document.body, [])).toThrow(
         'Could not find React container within specified host subtree.',
       );
     });
 
+    // @gate www
     it('should throw if an invalid host root is specified', () => {
       const ref = React.createRef();
       function Example() {
@@ -485,6 +502,7 @@ describe('ReactDOMTestSelectors', () => {
   });
 
   describe('getFindAllNodesFailureDescription', () => {
+    // @gate www
     it('should describe findAllNodes failures caused by the component type selector', () => {
       function Outer() {
         return <Middle />;
@@ -514,6 +532,7 @@ No matching component was found for:
       );
     });
 
+    // @gate www
     it('should return null if findAllNodes was able to find a match', () => {
       function Example() {
         return (
@@ -549,6 +568,7 @@ No matching component was found for:
       };
     }
 
+    // @gate www
     it('should return a single rect for a component that returns a single root host element', () => {
       const ref = React.createRef();
 
@@ -582,6 +602,7 @@ No matching component was found for:
       });
     });
 
+    // @gate www
     it('should return a multiple rects for multiple matches', () => {
       const outerRef = React.createRef();
       const innerRef = React.createRef();
@@ -631,6 +652,7 @@ No matching component was found for:
       });
     });
 
+    // @gate www
     it('should return a multiple rects for single match that returns a fragment', () => {
       const refA = React.createRef();
       const refB = React.createRef();
@@ -680,6 +702,7 @@ No matching component was found for:
       });
     });
 
+    // @gate www
     it('should merge overlapping rects', () => {
       const refA = React.createRef();
       const refB = React.createRef();
@@ -734,6 +757,7 @@ No matching component was found for:
       });
     });
 
+    // @gate www
     it('should merge some types of adjacent rects (if they are the same in one dimension)', () => {
       const refA = React.createRef();
       const refB = React.createRef();
@@ -833,6 +857,7 @@ No matching component was found for:
       });
     });
 
+    // @gate www
     it('should not search within hidden subtrees', () => {
       const refA = React.createRef();
       const refB = React.createRef();
@@ -889,6 +914,7 @@ No matching component was found for:
   });
 
   describe('focusWithin', () => {
+    // @gate www
     it('should return false if the specified component path has no matches', () => {
       function Example() {
         return <Child />;
@@ -909,6 +935,7 @@ No matching component was found for:
       expect(didFocus).toBe(false);
     });
 
+    // @gate www
     it('should return false if there are no focusable elements within the matched subtree', () => {
       function Example() {
         return <Child />;
@@ -926,6 +953,7 @@ No matching component was found for:
       expect(didFocus).toBe(false);
     });
 
+    // @gate www
     it('should return false if the only focusable elements are disabled', () => {
       function Example() {
         return (
@@ -943,6 +971,7 @@ No matching component was found for:
       expect(didFocus).toBe(false);
     });
 
+    // @gate www
     it('should return false if the only focusable elements are hidden', () => {
       function Example() {
         return <button hidden={true}>not clickable</button>;
@@ -956,6 +985,7 @@ No matching component was found for:
       expect(didFocus).toBe(false);
     });
 
+    // @gate www
     it('should successfully focus the first focusable element within the tree', () => {
       const secondRef = React.createRef(null);
 
@@ -1010,6 +1040,7 @@ No matching component was found for:
       expect(handleThirdFocus).not.toHaveBeenCalled();
     });
 
+    // @gate www
     it('should successfully focus the first focusable element even if application logic interferes', () => {
       const ref = React.createRef(null);
 
@@ -1039,6 +1070,7 @@ No matching component was found for:
       expect(handleFocus).toHaveBeenCalledTimes(1);
     });
 
+    // @gate www
     it('should not focus within hidden subtrees', () => {
       const secondRef = React.createRef(null);
 
@@ -1162,6 +1194,7 @@ No matching component was found for:
       window.IntersectionObserver = IntersectionObserver;
     });
 
+    // @gate www
     it('should notify a listener when the underlying instance intersection changes', () => {
       const ref = React.createRef(null);
 
@@ -1198,6 +1231,7 @@ No matching component was found for:
       expect(handleVisibilityChange).toHaveBeenCalledWith([{rect, ratio: 0.5}]);
     });
 
+    // @gate www
     it('should notify a listener of multiple targets when the underlying instance intersection changes', () => {
       const ref1 = React.createRef(null);
       const ref2 = React.createRef(null);
@@ -1274,6 +1308,7 @@ No matching component was found for:
       ]);
     });
 
+    // @gate www
     it('should stop listening when its disconnected', () => {
       const ref = React.createRef(null);
 
@@ -1308,7 +1343,7 @@ No matching component was found for:
     });
 
     // This test reuires gating because it relies on the __DEV__ only commit hook to work.
-    // @gate __DEV__
+    // @gate www && __DEV__
     it('should update which targets its listening to after a commit', () => {
       const ref1 = React.createRef(null);
       const ref2 = React.createRef(null);
@@ -1387,6 +1422,7 @@ No matching component was found for:
       ]);
     });
 
+    // @gate www
     it('should not observe components within hidden subtrees', () => {
       const ref1 = React.createRef(null);
       const ref2 = React.createRef(null);
diff --git a/packages/react-dom/src/__tests__/ReactUpdates-test.js b/packages/react-dom/src/__tests__/ReactUpdates-test.js
index dfa1a51939c3a..fd883f7e32d44 100644
--- a/packages/react-dom/src/__tests__/ReactUpdates-test.js
+++ b/packages/react-dom/src/__tests__/ReactUpdates-test.js
@@ -1300,7 +1300,7 @@ describe('ReactUpdates', () => {
     expect(ops).toEqual(['Foo', 'Bar', 'Baz']);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('delays sync updates inside hidden subtrees in Concurrent Mode', () => {
     const container = document.createElement('div');
 
diff --git a/packages/react-dom/src/__tests__/ReactWrongReturnPointer-test.js b/packages/react-dom/src/__tests__/ReactWrongReturnPointer-test.js
index 37b8f72cd2399..ac6e37374f0a8 100644
--- a/packages/react-dom/src/__tests__/ReactWrongReturnPointer-test.js
+++ b/packages/react-dom/src/__tests__/ReactWrongReturnPointer-test.js
@@ -194,7 +194,6 @@ test('warns in DEV if return pointer is inconsistent', async () => {
   );
 });
 
-// @gate experimental
 // @gate enableCache
 test('regression (#20932): return pointer is correct before entering deleted tree', async () => {
   // Based on a production bug. Designed to trigger a very specific
diff --git a/packages/react-dom/src/events/__tests__/DOMPluginEventSystem-test.internal.js b/packages/react-dom/src/events/__tests__/DOMPluginEventSystem-test.internal.js
index 81ce4ecc1940a..b4765bc8ad384 100644
--- a/packages/react-dom/src/events/__tests__/DOMPluginEventSystem-test.internal.js
+++ b/packages/react-dom/src/events/__tests__/DOMPluginEventSystem-test.internal.js
@@ -1257,7 +1257,7 @@ describe('DOMPluginEventSystem', () => {
             act = ReactTestUtils.unstable_concurrentAct;
           });
 
-          // @gate experimental
+          // @gate www
           it('can render correctly with the ReactDOMServer', () => {
             const clickEvent = jest.fn();
             const setClick = ReactDOM.unstable_createEventHandle('click');
@@ -1275,7 +1275,7 @@ describe('DOMPluginEventSystem', () => {
             expect(output).toBe(`<div>Hello world</div>`);
           });
 
-          // @gate experimental
+          // @gate www
           it('can render correctly with the ReactDOMServer hydration', () => {
             const clickEvent = jest.fn();
             const spanRef = React.createRef();
@@ -1301,7 +1301,7 @@ describe('DOMPluginEventSystem', () => {
             expect(clickEvent).toHaveBeenCalledTimes(1);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly work for a basic "click" listener', () => {
             let log = [];
             const clickEvent = jest.fn(event => {
@@ -1409,7 +1409,7 @@ describe('DOMPluginEventSystem', () => {
             expect(clickEvent2).toBeCalledTimes(1);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly work for setting and clearing a basic "click" listener', () => {
             const clickEvent = jest.fn();
             const divRef = React.createRef();
@@ -1450,7 +1450,7 @@ describe('DOMPluginEventSystem', () => {
             expect(clickEvent).toBeCalledTimes(0);
           });
 
-          // @gate experimental
+          // @gate www
           it('should handle the target being a text node', () => {
             const clickEvent = jest.fn();
             const buttonRef = React.createRef();
@@ -1472,7 +1472,7 @@ describe('DOMPluginEventSystem', () => {
             expect(clickEvent).toBeCalledTimes(1);
           });
 
-          // @gate experimental
+          // @gate www
           it('handle propagation of click events', () => {
             const buttonRef = React.createRef();
             const divRef = React.createRef();
@@ -1541,7 +1541,7 @@ describe('DOMPluginEventSystem', () => {
             expect(log[3]).toEqual(['bubble', buttonElement]);
           });
 
-          // @gate experimental
+          // @gate www
           it('handle propagation of click events mixed with onClick events', () => {
             const buttonRef = React.createRef();
             const divRef = React.createRef();
@@ -1601,7 +1601,7 @@ describe('DOMPluginEventSystem', () => {
             expect(log[5]).toEqual(['bubble', buttonElement]);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly work for a basic "click" listener on the outer target', () => {
             const log = [];
             const clickEvent = jest.fn(event => {
@@ -1666,7 +1666,7 @@ describe('DOMPluginEventSystem', () => {
             expect(clickEvent).toBeCalledTimes(2);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly handle many nested target listeners', () => {
             const buttonRef = React.createRef();
             const targetListener1 = jest.fn();
@@ -1769,7 +1769,7 @@ describe('DOMPluginEventSystem', () => {
             expect(targetListener4).toHaveBeenCalledTimes(2);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly handle stopPropagation correctly for target events', () => {
             const buttonRef = React.createRef();
             const divRef = React.createRef();
@@ -1807,7 +1807,7 @@ describe('DOMPluginEventSystem', () => {
             expect(clickEvent).toHaveBeenCalledTimes(0);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly handle stopPropagation correctly for many target events', () => {
             const buttonRef = React.createRef();
             const targetListener1 = jest.fn(e => e.stopPropagation());
@@ -1860,7 +1860,7 @@ describe('DOMPluginEventSystem', () => {
             expect(targetListener4).toHaveBeenCalledTimes(1);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly handle stopPropagation for mixed capture/bubbling target listeners', () => {
             const buttonRef = React.createRef();
             const targetListener1 = jest.fn(e => e.stopPropagation());
@@ -1917,7 +1917,7 @@ describe('DOMPluginEventSystem', () => {
             expect(targetListener4).toHaveBeenCalledTimes(0);
           });
 
-          // @gate experimental
+          // @gate www
           it('should work with concurrent mode updates', async () => {
             const log = [];
             const ref = React.createRef();
@@ -1970,7 +1970,7 @@ describe('DOMPluginEventSystem', () => {
             expect(log).toEqual([{counter: 1}]);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly work for a basic "click" window listener', () => {
             const log = [];
             const clickEvent = jest.fn(event => {
@@ -2021,7 +2021,7 @@ describe('DOMPluginEventSystem', () => {
             expect(clickEvent).toBeCalledTimes(2);
           });
 
-          // @gate experimental
+          // @gate www
           it('handle propagation of click events on the window', () => {
             const buttonRef = React.createRef();
             const divRef = React.createRef();
@@ -2101,7 +2101,7 @@ describe('DOMPluginEventSystem', () => {
             expect(log[5]).toEqual(['bubble', window]);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly handle stopPropagation for mixed listeners', () => {
             const buttonRef = React.createRef();
             const rootListener1 = jest.fn(e => e.stopPropagation());
@@ -2152,7 +2152,7 @@ describe('DOMPluginEventSystem', () => {
             expect(rootListener2).toHaveBeenCalledTimes(0);
           });
 
-          // @gate experimental
+          // @gate www
           it('should correctly handle stopPropagation for delegated listeners', () => {
             const buttonRef = React.createRef();
             const rootListener1 = jest.fn(e => e.stopPropagation());
@@ -2198,7 +2198,7 @@ describe('DOMPluginEventSystem', () => {
             expect(rootListener4).toHaveBeenCalledTimes(0);
           });
 
-          // @gate experimental
+          // @gate www
           it('handle propagation of click events on the window and document', () => {
             const buttonRef = React.createRef();
             const divRef = React.createRef();
@@ -2311,7 +2311,7 @@ describe('DOMPluginEventSystem', () => {
             }
           });
 
-          // @gate experimental
+          // @gate www
           it('does not support custom user events', () => {
             // With eager listeners, supporting custom events via this API doesn't make sense
             // because we can't know a full list of them ahead of time. Let's check we throw
@@ -2323,7 +2323,7 @@ describe('DOMPluginEventSystem', () => {
             );
           });
 
-          // @gate experimental
+          // @gate www
           it('beforeblur and afterblur are called after a focused element is unmounted', () => {
             const log = [];
             // We have to persist here because we want to read relatedTarget later.
@@ -2382,7 +2382,7 @@ describe('DOMPluginEventSystem', () => {
             expect(log).toEqual(['beforeblur', 'afterblur']);
           });
 
-          // @gate experimental
+          // @gate www
           it('beforeblur and afterblur are called after a nested focused element is unmounted', () => {
             const log = [];
             // We have to persist here because we want to read relatedTarget later.
@@ -2445,7 +2445,7 @@ describe('DOMPluginEventSystem', () => {
             expect(log).toEqual(['beforeblur', 'afterblur']);
           });
 
-          // @gate experimental
+          // @gate www
           it('beforeblur should skip handlers from a deleted subtree after the focused element is unmounted', () => {
             const onBeforeBlur = jest.fn();
             const innerRef = React.createRef();
@@ -2499,7 +2499,7 @@ describe('DOMPluginEventSystem', () => {
             expect(onBeforeBlur).toHaveBeenCalledTimes(1);
           });
 
-          // @gate experimental
+          // @gate www
           it('beforeblur and afterblur are called after a focused element is suspended', () => {
             const log = [];
             // We have to persist here because we want to read relatedTarget later.
@@ -2585,7 +2585,7 @@ describe('DOMPluginEventSystem', () => {
             document.body.removeChild(container2);
           });
 
-          // @gate experimental
+          // @gate www
           it('beforeblur should skip handlers from a deleted subtree after the focused element is suspended', () => {
             const onBeforeBlur = jest.fn();
             const innerRef = React.createRef();
@@ -2666,7 +2666,7 @@ describe('DOMPluginEventSystem', () => {
             document.body.removeChild(container2);
           });
 
-          // @gate experimental
+          // @gate www
           it('regression: does not fire beforeblur/afterblur if target is already hidden', () => {
             const Suspense = React.Suspense;
             let suspend = false;
@@ -2728,7 +2728,7 @@ describe('DOMPluginEventSystem', () => {
             document.body.removeChild(container2);
           });
 
-          // @gate experimental
+          // @gate www
           it('handle propagation of click events between disjointed comment roots', () => {
             const buttonRef = React.createRef();
             const divRef = React.createRef();
@@ -2799,7 +2799,7 @@ describe('DOMPluginEventSystem', () => {
             expect(log[5]).toEqual(['bubble', buttonElement]);
           });
 
-          // @gate experimental
+          // @gate www
           it('propagates known createEventHandle events through portals without inner listeners', () => {
             const buttonRef = React.createRef();
             const divRef = React.createRef();
@@ -2870,7 +2870,7 @@ describe('DOMPluginEventSystem', () => {
               ReactDOMServer = require('react-dom/server');
             });
 
-            // @gate experimental
+            // @gate www
             it('handle propagation of click events on a scope', () => {
               const buttonRef = React.createRef();
               const log = [];
@@ -2926,7 +2926,7 @@ describe('DOMPluginEventSystem', () => {
               ]);
             });
 
-            // @gate experimental
+            // @gate www
             it('handle mixed propagation of click events on a scope', () => {
               const buttonRef = React.createRef();
               const divRef = React.createRef();
@@ -3017,7 +3017,7 @@ describe('DOMPluginEventSystem', () => {
               ]);
             });
 
-            // @gate experimental
+            // @gate www
             it('should not handle the target being a dangling text node within a scope', () => {
               const clickEvent = jest.fn();
               const buttonRef = React.createRef();
@@ -3048,7 +3048,7 @@ describe('DOMPluginEventSystem', () => {
               expect(clickEvent).toBeCalledTimes(0);
             });
 
-            // @gate experimental
+            // @gate www
             it('handle stopPropagation (inner) correctly between scopes', () => {
               const buttonRef = React.createRef();
               const outerOnClick = jest.fn();
@@ -3090,7 +3090,7 @@ describe('DOMPluginEventSystem', () => {
               expect(outerOnClick).toHaveBeenCalledTimes(0);
             });
 
-            // @gate experimental
+            // @gate www
             it('handle stopPropagation (outer) correctly between scopes', () => {
               const buttonRef = React.createRef();
               const outerOnClick = jest.fn(e => e.stopPropagation());
@@ -3132,7 +3132,7 @@ describe('DOMPluginEventSystem', () => {
               expect(outerOnClick).toHaveBeenCalledTimes(1);
             });
 
-            // @gate experimental
+            // @gate www
             it('handle stopPropagation (inner and outer) correctly between scopes', () => {
               const buttonRef = React.createRef();
               const onClick = jest.fn(e => e.stopPropagation());
@@ -3172,7 +3172,7 @@ describe('DOMPluginEventSystem', () => {
               expect(onClick).toHaveBeenCalledTimes(1);
             });
 
-            // @gate experimental
+            // @gate www
             it('should be able to register handlers for events affected by the intervention', () => {
               const rootContainer = document.createElement('div');
               container.appendChild(rootContainer);
diff --git a/packages/react-fetch/src/__tests__/ReactFetchNode-test.js b/packages/react-fetch/src/__tests__/ReactFetchNode-test.js
index 6ad5fdc9c434f..e7c4884c40554 100644
--- a/packages/react-fetch/src/__tests__/ReactFetchNode-test.js
+++ b/packages/react-fetch/src/__tests__/ReactFetchNode-test.js
@@ -39,7 +39,7 @@ describe('ReactFetchNode', () => {
     server = null;
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('can fetch text from a server component', async () => {
     serverImpl = (req, res) => {
       res.write('mango');
@@ -51,7 +51,7 @@ describe('ReactFetchNode', () => {
     expect(text).toEqual('mango');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('can fetch json from a server component', async () => {
     serverImpl = (req, res) => {
       res.write(JSON.stringify({name: 'Sema'}));
@@ -63,7 +63,7 @@ describe('ReactFetchNode', () => {
     expect(json).toEqual({name: 'Sema'});
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('provides response status', async () => {
     serverImpl = (req, res) => {
       res.write(JSON.stringify({name: 'Sema'}));
@@ -79,7 +79,7 @@ describe('ReactFetchNode', () => {
     });
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('handles different paths', async () => {
     serverImpl = (req, res) => {
       switch (req.url) {
@@ -105,7 +105,7 @@ describe('ReactFetchNode', () => {
     expect(outputs).toMatchObject(['banana', 'mango', 'orange']);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('can produce an error', async () => {
     serverImpl = (req, res) => {};
 
diff --git a/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocus-test.internal.js b/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocus-test.internal.js
index d8f8f3c7d31bb..2d3de4e13e26a 100644
--- a/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocus-test.internal.js
+++ b/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocus-test.internal.js
@@ -28,7 +28,7 @@ function initializeModules(hasPointerEvents) {
 
   // TODO: This import throws outside of experimental mode. Figure out better
   // strategy for gated imports.
-  if (__EXPERIMENTAL__) {
+  if (__EXPERIMENTAL__ || global.__WWW__) {
     useFocus = require('react-interactions/events/focus').useFocus;
   }
 }
@@ -70,7 +70,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('does not call callbacks', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -97,7 +97,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('is called after "blur" event', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -128,7 +128,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('is called after "focus" event', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -136,7 +136,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       expect(onFocus).toHaveBeenCalledTimes(1);
     });
 
-    // @gate experimental
+    // @gate www
     it('is not called if descendants of target receive focus', () => {
       componentInit();
       const target = createEventTarget(innerRef.current);
@@ -166,7 +166,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('is called after "blur" and "focus" events', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -178,7 +178,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       expect(onFocusChange).toHaveBeenCalledWith(false);
     });
 
-    // @gate experimental
+    // @gate www
     it('is not called after "blur" and "focus" events on descendants', () => {
       componentInit();
       const target = createEventTarget(innerRef.current);
@@ -210,7 +210,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('is called after "focus" and "blur" if keyboard navigation is active', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -225,7 +225,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       expect(onFocusVisibleChange).toHaveBeenCalledWith(false);
     });
 
-    // @gate experimental
+    // @gate www
     it('is called if non-keyboard event is dispatched on target previously focused with keyboard', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -244,7 +244,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       expect(onFocusVisibleChange).toHaveBeenCalledTimes(2);
     });
 
-    // @gate experimental
+    // @gate www
     it('is not called after "focus" and "blur" events without keyboard', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -256,7 +256,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
       expect(onFocusVisibleChange).toHaveBeenCalledTimes(0);
     });
 
-    // @gate experimental
+    // @gate www
     it('is not called after "blur" and "focus" events on descendants', () => {
       componentInit();
       const innerTarget = createEventTarget(innerRef.current);
@@ -270,7 +270,7 @@ describe.each(table)(`useFocus hasPointerEvents=%s`, hasPointerEvents => {
   });
 
   describe('nested Focus components', () => {
-    // @gate experimental
+    // @gate www
     it('propagates events in the correct order', () => {
       const events = [];
       const innerRef = React.createRef();
diff --git a/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocusWithin-test.internal.js b/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocusWithin-test.internal.js
index f1e8f57ac08d5..62eb6630de2ee 100644
--- a/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocusWithin-test.internal.js
+++ b/packages/react-interactions/events/src/dom/create-event-handle/__tests__/useFocusWithin-test.internal.js
@@ -33,7 +33,7 @@ function initializeModules(hasPointerEvents) {
 
   // TODO: This import throws outside of experimental mode. Figure out better
   // strategy for gated imports.
-  if (__EXPERIMENTAL__) {
+  if (__EXPERIMENTAL__ || global.__WWW__) {
     useFocusWithin = require('react-interactions/events/focus').useFocusWithin;
   }
 }
@@ -80,7 +80,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('prevents custom events being dispatched', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -115,7 +115,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('is called after "blur" and "focus" events on focus target', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -127,7 +127,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(onFocusWithinChange).toHaveBeenCalledWith(false);
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after "blur" and "focus" events on descendants', () => {
       componentInit();
       const target = createEventTarget(innerRef.current);
@@ -139,7 +139,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(onFocusWithinChange).toHaveBeenCalledWith(false);
     });
 
-    // @gate experimental
+    // @gate www
     it('is only called once when focus moves within and outside the subtree', () => {
       componentInit();
       const node = ref.current;
@@ -191,7 +191,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       Scheduler.unstable_flushAll();
     };
 
-    // @gate experimental
+    // @gate www
     it('is called after "focus" and "blur" on focus target if keyboard was used', () => {
       componentInit();
       const target = createEventTarget(ref.current);
@@ -206,7 +206,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(onFocusWithinVisibleChange).toHaveBeenCalledWith(false);
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after "focus" and "blur" on descendants if keyboard was used', () => {
       componentInit();
       const innerTarget = createEventTarget(innerRef.current);
@@ -221,7 +221,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(onFocusWithinVisibleChange).toHaveBeenCalledWith(false);
     });
 
-    // @gate experimental
+    // @gate www
     it('is called if non-keyboard event is dispatched on target previously focused with keyboard', () => {
       componentInit();
       const node = ref.current;
@@ -259,7 +259,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(onFocusWithinVisibleChange).toHaveBeenCalledTimes(4);
     });
 
-    // @gate experimental
+    // @gate www
     it('is not called after "focus" and "blur" events without keyboard', () => {
       componentInit();
       const innerTarget = createEventTarget(innerRef.current);
@@ -269,7 +269,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(onFocusWithinVisibleChange).toHaveBeenCalledTimes(0);
     });
 
-    // @gate experimental
+    // @gate www
     it('is only called once when focus moves within and outside the subtree', () => {
       componentInit();
       const node = ref.current;
@@ -297,7 +297,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
     });
   });
 
-  // @gate experimental
+  // @gate www
   it('should correctly handle focus visibility when typing into an input', () => {
     const onFocusWithinVisibleChange = jest.fn();
     const ref = React.createRef();
@@ -337,7 +337,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       innerRef2 = React.createRef();
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after a focused element is unmounted', () => {
       const Component = ({show}) => {
         const focusWithinRef = useFocusWithin(ref, {
@@ -369,7 +369,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       );
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after a nested focused element is unmounted', () => {
       const Component = ({show}) => {
         const focusWithinRef = useFocusWithin(ref, {
@@ -405,7 +405,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       );
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after many elements are unmounted', () => {
       const buttonRef = React.createRef();
       const inputRef = React.createRef();
@@ -440,7 +440,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(onAfterBlurWithin).toHaveBeenCalledTimes(1);
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after a nested focused element is unmounted (with scope query)', () => {
       const TestScope = React.unstable_Scope;
       const testScopeQuery = (type, props) => true;
@@ -476,7 +476,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       expect(targetNodes).toEqual([targetNode]);
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after a focused suspended element is hidden', () => {
       const Suspense = React.Suspense;
       let suspend = false;
@@ -534,7 +534,7 @@ describe.each(table)(`useFocus`, hasPointerEvents => {
       resolve();
     });
 
-    // @gate experimental
+    // @gate www
     it('is called after a focused suspended element is hidden then shown', () => {
       const Suspense = React.Suspense;
       let suspend = false;
diff --git a/packages/react-reconciler/src/__tests__/DebugTracing-test.internal.js b/packages/react-reconciler/src/__tests__/DebugTracing-test.internal.js
index c3dc4df1cf6ff..94431b435054e 100644
--- a/packages/react-reconciler/src/__tests__/DebugTracing-test.internal.js
+++ b/packages/react-reconciler/src/__tests__/DebugTracing-test.internal.js
@@ -43,7 +43,7 @@ describe('DebugTracing', () => {
     });
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('should not log anything for sync render without suspends or state updates', () => {
     ReactTestRenderer.create(
       <React.unstable_DebugTracingMode>
@@ -54,7 +54,7 @@ describe('DebugTracing', () => {
     expect(logs).toEqual([]);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('should not log anything for concurrent render without suspends or state updates', () => {
     ReactTestRenderer.create(
       <React.unstable_DebugTracingMode>
@@ -396,7 +396,7 @@ describe('DebugTracing', () => {
     ]);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('should not log anything outside of a unstable_DebugTracingMode subtree', () => {
     function ExampleThatCascades() {
       const [didMount, setDidMount] = React.useState(false);
diff --git a/packages/react-reconciler/src/__tests__/ReactCache-test.js b/packages/react-reconciler/src/__tests__/ReactCache-test.js
index 33f4353649cab..01488a8b3a7ba 100644
--- a/packages/react-reconciler/src/__tests__/ReactCache-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactCache-test.js
@@ -149,7 +149,7 @@ describe('ReactCache', () => {
     }
   }
 
-  // @gate experimental
+  // @gate experimental || www
   test('render Cache component', async () => {
     const root = ReactNoop.createRoot();
     await ReactNoop.act(async () => {
@@ -158,7 +158,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('Hi');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('mount new data', async () => {
     const root = ReactNoop.createRoot();
     await ReactNoop.act(async () => {
@@ -180,7 +180,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('root acts as implicit cache boundary', async () => {
     const root = ReactNoop.createRoot();
     await ReactNoop.act(async () => {
@@ -200,7 +200,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('multiple new Cache boundaries in the same update share the same, fresh cache', async () => {
     function App({text}) {
       return (
@@ -239,7 +239,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('AA');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test(
     'nested cache boundaries share the same cache as the root during ' +
       'the initial render',
@@ -272,7 +272,7 @@ describe('ReactCache', () => {
     },
   );
 
-  // @gate experimental
+  // @gate experimental || www
   test('new content inside an existing Cache boundary should re-use already cached data', async () => {
     function App({showMore}) {
       return (
@@ -309,7 +309,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A [v1]A [v1]');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('a new Cache boundary uses fresh cache', async () => {
     // The only difference from the previous test is that the "Show More"
     // content is wrapped in a nested <Cache /> boundary
@@ -356,7 +356,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A [v1]A [v2]');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('inner content uses same cache as shell if spawned by the same transition', async () => {
     const root = ReactNoop.createRoot();
 
@@ -431,7 +431,7 @@ describe('ReactCache', () => {
     );
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('refresh a cache', async () => {
     let refresh;
     function App() {
@@ -474,7 +474,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A [v2]');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('refresh the root cache', async () => {
     let refresh;
     function App() {
@@ -515,7 +515,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A [v2]');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('refresh a cache with seed data', async () => {
     let refresh;
     function App() {
@@ -558,7 +558,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A [v2]');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('refreshing a parent cache also refreshes its children', async () => {
     let refreshShell;
     function RefreshShell() {
@@ -623,7 +623,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A [v3]A [v3]');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test(
     'refreshing a cache boundary does not refresh the other boundaries ' +
       'that mounted at the same time (i.e. the ones that share the same cache)',
@@ -696,7 +696,7 @@ describe('ReactCache', () => {
     },
   );
 
-  // @gate experimental
+  // @gate experimental || www
   test(
     'mount a new Cache boundary in a sibling while simultaneously ' +
       'resolving a Suspense boundary',
@@ -758,7 +758,7 @@ describe('ReactCache', () => {
     },
   );
 
-  // @gate experimental
+  // @gate experimental || www
   test('cache pool is cleared once transitions that depend on it commit their shell', async () => {
     function Child({text}) {
       return (
@@ -841,7 +841,7 @@ describe('ReactCache', () => {
     expect(root).toMatchRenderedOutput('A [v1]A [v1]A [v2]');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('cache pool is not cleared by arbitrary commits', async () => {
     function App() {
       return (
diff --git a/packages/react-reconciler/src/__tests__/ReactContextPropagation-test.js b/packages/react-reconciler/src/__tests__/ReactContextPropagation-test.js
index 45079c89edee0..0dcc18f074ac9 100644
--- a/packages/react-reconciler/src/__tests__/ReactContextPropagation-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactContextPropagation-test.js
@@ -542,7 +542,7 @@ describe('ReactLazyContextPropagation', () => {
     expect(root).toMatchRenderedOutput('BB');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('context is propagated through offscreen trees', async () => {
     const LegacyHidden = React.unstable_LegacyHidden;
 
@@ -588,7 +588,7 @@ describe('ReactLazyContextPropagation', () => {
     expect(root).toMatchRenderedOutput('BB');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('multiple contexts are propagated across through offscreen trees', async () => {
     // Same as previous test, but with multiple context providers
     const LegacyHidden = React.unstable_LegacyHidden;
@@ -744,7 +744,6 @@ describe('ReactLazyContextPropagation', () => {
     expect(root).toMatchRenderedOutput('BB');
   });
 
-  // @gate experimental
   // @gate enableCache
   test('nested bailouts across retries', async () => {
     // Lazy context propagation will stop propagating when it hits the first
@@ -814,7 +813,7 @@ describe('ReactLazyContextPropagation', () => {
     expect(root).toMatchRenderedOutput('BB');
   });
 
-  // @gate experimental
+  // @gate experimental || www
   test('nested bailouts through offscreen trees', async () => {
     // Lazy context propagation will stop propagating when it hits the first
     // match. If we bail out again inside that tree, we must resume propagating.
diff --git a/packages/react-reconciler/src/__tests__/ReactIncremental-test.js b/packages/react-reconciler/src/__tests__/ReactIncremental-test.js
index f1986249c0d21..864723e927b8f 100644
--- a/packages/react-reconciler/src/__tests__/ReactIncremental-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactIncremental-test.js
@@ -270,7 +270,7 @@ describe('ReactIncremental', () => {
     expect(inst.state).toEqual({text: 'bar', text2: 'baz'});
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('can deprioritize unfinished work and resume it later', () => {
     function Bar(props) {
       Scheduler.unstable_yieldValue('Bar');
@@ -316,7 +316,7 @@ describe('ReactIncremental', () => {
     expect(Scheduler).toFlushAndYield(['Middle', 'Middle']);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('can deprioritize a tree from without dropping work', () => {
     function Bar(props) {
       Scheduler.unstable_yieldValue('Bar');
@@ -1999,7 +1999,7 @@ describe('ReactIncremental', () => {
     });
   }
 
-  // @gate experimental
+  // @gate experimental || www
   it('provides context when reusing work', () => {
     class Intl extends React.Component {
       static childContextTypes = {
diff --git a/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js b/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js
index c0d269fa25ae5..ed4c945ea7f39 100644
--- a/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js
+++ b/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js
@@ -308,7 +308,7 @@ describe('ReactIncrementalErrorHandling', () => {
     expect(ReactNoop.getChildren()).toEqual([span('Everything is fine.')]);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('does not include offscreen work when retrying after an error', () => {
     function App(props) {
       if (props.isBroken) {
diff --git a/packages/react-reconciler/src/__tests__/ReactIncrementalSideEffects-test.js b/packages/react-reconciler/src/__tests__/ReactIncrementalSideEffects-test.js
index bb42fc621f541..f0c6bad86319a 100644
--- a/packages/react-reconciler/src/__tests__/ReactIncrementalSideEffects-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactIncrementalSideEffects-test.js
@@ -424,7 +424,7 @@ describe('ReactIncrementalSideEffects', () => {
     ]);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('preserves a previously rendered node when deprioritized', () => {
     function Middle(props) {
       Scheduler.unstable_yieldValue('Middle');
@@ -475,7 +475,7 @@ describe('ReactIncrementalSideEffects', () => {
     );
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('can reuse side-effects after being preempted', () => {
     function Bar(props) {
       Scheduler.unstable_yieldValue('Bar');
@@ -555,7 +555,7 @@ describe('ReactIncrementalSideEffects', () => {
     );
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('can reuse side-effects after being preempted, if shouldComponentUpdate is false', () => {
     class Bar extends React.Component {
       shouldComponentUpdate(nextProps) {
@@ -690,7 +690,7 @@ describe('ReactIncrementalSideEffects', () => {
     expect(ReactNoop.getChildrenAsJSX()).toEqual(<span prop={3} />);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('updates a child even though the old props is empty', () => {
     function Foo(props) {
       return (
@@ -930,7 +930,7 @@ describe('ReactIncrementalSideEffects', () => {
     expect(ops).toEqual(['Bar', 'Baz', 'Bar', 'Bar']);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('deprioritizes setStates that happens within a deprioritized tree', () => {
     const barInstances = [];
 
diff --git a/packages/react-reconciler/src/__tests__/ReactNewContext-test.js b/packages/react-reconciler/src/__tests__/ReactNewContext-test.js
index 60db80402fb5e..eb90d61dad6a1 100644
--- a/packages/react-reconciler/src/__tests__/ReactNewContext-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactNewContext-test.js
@@ -667,7 +667,7 @@ describe('ReactNewContext', () => {
         expect(ReactNoop.getChildren()).toEqual([span(2), span(2)]);
       });
 
-      // @gate experimental
+      // @gate experimental || www
       it("context consumer doesn't bail out inside hidden subtree", () => {
         const Context = React.createContext('dark');
         const Consumer = getConsumer(Context);
diff --git a/packages/react-reconciler/src/__tests__/ReactOffscreen-test.js b/packages/react-reconciler/src/__tests__/ReactOffscreen-test.js
index da6778aefc894..ec6ee2c407ea6 100644
--- a/packages/react-reconciler/src/__tests__/ReactOffscreen-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactOffscreen-test.js
@@ -24,7 +24,7 @@ describe('ReactOffscreen', () => {
     return <span prop={props.text} />;
   }
 
-  // @gate experimental
+  // @gate experimental || www
   it('unstable-defer-without-hiding should never toggle the visibility of its children', async () => {
     function App({mode}) {
       return (
@@ -83,7 +83,7 @@ describe('ReactOffscreen', () => {
     );
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('does not defer in legacy mode', async () => {
     let setState;
     function Foo() {
@@ -128,7 +128,7 @@ describe('ReactOffscreen', () => {
     );
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('does defer in concurrent mode', async () => {
     let setState;
     function Foo() {
@@ -174,7 +174,7 @@ describe('ReactOffscreen', () => {
     );
   });
 
-  // @gate experimental
+  // @gate experimental || www
   // @gate enableSuspenseLayoutEffectSemantics
   it('mounts without layout effects when hidden', async () => {
     function Child({text}) {
@@ -216,7 +216,7 @@ describe('ReactOffscreen', () => {
     expect(root).toMatchRenderedOutput(<span prop="Child" />);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   // @gate enableSuspenseLayoutEffectSemantics
   it('mounts/unmounts layout effects when visibility changes (starting visible)', async () => {
     function Child({text}) {
@@ -266,7 +266,7 @@ describe('ReactOffscreen', () => {
     expect(root).toMatchRenderedOutput(<span prop="Child" />);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   // @gate enableSuspenseLayoutEffectSemantics
   it('mounts/unmounts layout effects when visibility changes (starting hidden)', async () => {
     function Child({text}) {
diff --git a/packages/react-reconciler/src/__tests__/ReactSchedulerIntegration-test.js b/packages/react-reconciler/src/__tests__/ReactSchedulerIntegration-test.js
index 082b7c15f94e3..5f527d75755a7 100644
--- a/packages/react-reconciler/src/__tests__/ReactSchedulerIntegration-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactSchedulerIntegration-test.js
@@ -120,7 +120,7 @@ describe('ReactSchedulerIntegration', () => {
     expect(Scheduler).toHaveYielded(['A', 'B', 'C']);
   });
 
-  // @gate experimental
+  // @gate experimental || www
   it('idle updates are not blocked by offscreen work', async () => {
     function Text({text}) {
       Scheduler.unstable_yieldValue(text);
diff --git a/packages/react-reconciler/src/__tests__/ReactScope-test.internal.js b/packages/react-reconciler/src/__tests__/ReactScope-test.internal.js
index 10cdadfc66dbe..dedc8146d8082 100644
--- a/packages/react-reconciler/src/__tests__/ReactScope-test.internal.js
+++ b/packages/react-reconciler/src/__tests__/ReactScope-test.internal.js
@@ -39,7 +39,7 @@ describe('ReactScope', () => {
       container = null;
     });
 
-    // @gate experimental
+    // @gate www
     it('DO_NOT_USE_queryAllNodes() works as intended', () => {
       const testScopeQuery = (type, props) => true;
       const TestScope = React.unstable_Scope;
@@ -74,7 +74,7 @@ describe('ReactScope', () => {
       expect(scopeRef.current).toBe(null);
     });
 
-    // @gate experimental
+    // @gate www
     it('DO_NOT_USE_queryAllNodes() provides the correct host instance', () => {
       const testScopeQuery = (type, props) => type === 'div';
       const TestScope = React.unstable_Scope;
@@ -121,7 +121,7 @@ describe('ReactScope', () => {
       expect(scopeRef.current).toBe(null);
     });
 
-    // @gate experimental
+    // @gate www
     it('DO_NOT_USE_queryFirstNode() works as intended', () => {
       const testScopeQuery = (type, props) => true;
       const TestScope = React.unstable_Scope;
@@ -156,7 +156,7 @@ describe('ReactScope', () => {
       expect(scopeRef.current).toBe(null);
     });
 
-    // @gate experimental
+    // @gate www
     it('containsNode() works as intended', () => {
       const TestScope = React.unstable_Scope;
       const scopeRef = React.createRef();
@@ -206,7 +206,7 @@ describe('ReactScope', () => {
       expect(scopeRef.current.containsNode(emRef.current)).toBe(false);
     });
 
-    // @gate experimental
+    // @gate www
     it('scopes support server-side rendering and hydration', () => {
       const TestScope = React.unstable_Scope;
       const scopeRef = React.createRef();
@@ -237,7 +237,7 @@ describe('ReactScope', () => {
       expect(nodes).toEqual([divRef.current, spanRef.current, aRef.current]);
     });
 
-    // @gate experimental
+    // @gate www
     it('getChildContextValues() works as intended', () => {
       const TestContext = React.createContext();
       const TestScope = React.unstable_Scope;
@@ -266,7 +266,7 @@ describe('ReactScope', () => {
       expect(scopeRef.current).toBe(null);
     });
 
-    // @gate experimental
+    // @gate www
     it('correctly works with suspended boundaries that are hydrated', async () => {
       let suspend = false;
       let resolve;
@@ -341,7 +341,7 @@ describe('ReactScope', () => {
       ReactTestRenderer = require('react-test-renderer');
     });
 
-    // @gate experimental
+    // @gate www
     it('DO_NOT_USE_queryAllNodes() works as intended', () => {
       const testScopeQuery = (type, props) => true;
       const TestScope = React.unstable_Scope;
@@ -378,7 +378,7 @@ describe('ReactScope', () => {
       expect(nodes).toEqual([aRef.current, divRef.current, spanRef.current]);
     });
 
-    // @gate experimental
+    // @gate www
     it('DO_NOT_USE_queryFirstNode() works as intended', () => {
       const testScopeQuery = (type, props) => true;
       const TestScope = React.unstable_Scope;
@@ -415,7 +415,7 @@ describe('ReactScope', () => {
       expect(node).toEqual(aRef.current);
     });
 
-    // @gate experimental
+    // @gate www
     it('containsNode() works as intended', () => {
       const TestScope = React.unstable_Scope;
       const scopeRef = React.createRef();
diff --git a/packages/react-reconciler/src/__tests__/ReactSubtreeFlagsWarning-test.js b/packages/react-reconciler/src/__tests__/ReactSubtreeFlagsWarning-test.js
index c972d6ae472c0..c2c872dc41fae 100644
--- a/packages/react-reconciler/src/__tests__/ReactSubtreeFlagsWarning-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactSubtreeFlagsWarning-test.js
@@ -124,7 +124,7 @@ describe('ReactSuspenseWithNoopRenderer', () => {
 
   const resolveText = resolveMostRecentTextCache;
 
-  // @gate experimental
+  // @gate experimental || www
   it('regression: false positive for legacy suspense', async () => {
     // Wrapping in memo because regular function components go through the
     // mountIndeterminateComponent path, which acts like there's no `current`
diff --git a/scripts/jest/TestFlags.js b/scripts/jest/TestFlags.js
index 93ba09dbf0324..3b6fc83ac9845 100644
--- a/scripts/jest/TestFlags.js
+++ b/scripts/jest/TestFlags.js
@@ -81,11 +81,6 @@ function getTestFlags() {
 
       ...featureFlags,
       ...environmentFlags,
-
-      // FIXME: www-classic has enableCache on, but when running the source
-      // tests, Jest doesn't expose the API correctly. Fix then remove
-      // this override.
-      enableCache: __EXPERIMENTAL__,
     },
     {
       get(flags, flagName) {
diff --git a/scripts/jest/config.source-persistent.js b/scripts/jest/config.source-persistent.js
index 63c95c5584ba2..935c4463c1c90 100644
--- a/scripts/jest/config.source-persistent.js
+++ b/scripts/jest/config.source-persistent.js
@@ -2,28 +2,7 @@
 
 const baseConfig = require('./config.base');
 
-const RELEASE_CHANNEL = process.env.RELEASE_CHANNEL;
-
-// Default to building in experimental mode. If the release channel is set via
-// an environment variable, then check if it's "experimental".
-const __EXPERIMENTAL__ =
-  typeof RELEASE_CHANNEL === 'string'
-    ? RELEASE_CHANNEL === 'experimental'
-    : true;
-
-const preferredExtension = __EXPERIMENTAL__ ? '.js' : '.stable.js';
-
-const moduleNameMapper = {};
-moduleNameMapper[
-  '^react$'
-] = `<rootDir>/packages/react/index${preferredExtension}`;
-moduleNameMapper[
-  '^react-dom$'
-] = `<rootDir>/packages/react-dom/index${preferredExtension}`;
-
 module.exports = Object.assign({}, baseConfig, {
-  // Prefer the stable forks for tests.
-  moduleNameMapper,
   modulePathIgnorePatterns: [
     ...baseConfig.modulePathIgnorePatterns,
     'packages/react-devtools-shared',
diff --git a/scripts/jest/config.source-www.js b/scripts/jest/config.source-www.js
index 060291a748216..d8d29872c1940 100644
--- a/scripts/jest/config.source-www.js
+++ b/scripts/jest/config.source-www.js
@@ -2,28 +2,7 @@
 
 const baseConfig = require('./config.base');
 
-const RELEASE_CHANNEL = process.env.RELEASE_CHANNEL;
-
-// Default to building in experimental mode. If the release channel is set via
-// an environment variable, then check if it's "experimental".
-const __EXPERIMENTAL__ =
-  typeof RELEASE_CHANNEL === 'string'
-    ? RELEASE_CHANNEL === 'experimental'
-    : true;
-
-const preferredExtension = __EXPERIMENTAL__ ? '.js' : '.stable.js';
-
-const moduleNameMapper = {};
-moduleNameMapper[
-  '^react$'
-] = `<rootDir>/packages/react/index${preferredExtension}`;
-moduleNameMapper[
-  '^react-dom$'
-] = `<rootDir>/packages/react-dom/index${preferredExtension}`;
-
 module.exports = Object.assign({}, baseConfig, {
-  // Prefer the stable forks for tests.
-  moduleNameMapper,
   modulePathIgnorePatterns: [
     ...baseConfig.modulePathIgnorePatterns,
     'packages/react-devtools-shared',
diff --git a/scripts/jest/config.source.js b/scripts/jest/config.source.js
index 18f44e3b72160..2e3401a4ba5c4 100644
--- a/scripts/jest/config.source.js
+++ b/scripts/jest/config.source.js
@@ -2,28 +2,7 @@
 
 const baseConfig = require('./config.base');
 
-const RELEASE_CHANNEL = process.env.RELEASE_CHANNEL;
-
-// Default to building in experimental mode. If the release channel is set via
-// an environment variable, then check if it's "experimental".
-const __EXPERIMENTAL__ =
-  typeof RELEASE_CHANNEL === 'string'
-    ? RELEASE_CHANNEL === 'experimental'
-    : true;
-
-const preferredExtension = __EXPERIMENTAL__ ? '.js' : '.stable.js';
-
-const moduleNameMapper = {};
-moduleNameMapper[
-  '^react$'
-] = `<rootDir>/packages/react/index${preferredExtension}`;
-moduleNameMapper[
-  '^react-dom$'
-] = `<rootDir>/packages/react-dom/index${preferredExtension}`;
-
 module.exports = Object.assign({}, baseConfig, {
-  // Prefer the stable forks for tests.
-  moduleNameMapper,
   modulePathIgnorePatterns: [
     ...baseConfig.modulePathIgnorePatterns,
     'packages/react-devtools-shared',
diff --git a/scripts/jest/setupHostConfigs.js b/scripts/jest/setupHostConfigs.js
index f21ea11356d26..1dc72761e03ba 100644
--- a/scripts/jest/setupHostConfigs.js
+++ b/scripts/jest/setupHostConfigs.js
@@ -1,7 +1,55 @@
 'use strict';
 
+const fs = require('fs');
 const inlinedHostConfigs = require('../shared/inlinedHostConfigs');
 
+function resolveEntryFork(resolvedEntry, isFBBundle) {
+  // Pick which entry point fork to use:
+  // .modern.fb.js
+  // .classic.fb.js
+  // .fb.js
+  // .stable.js
+  // .experimental.js
+  // .js
+
+  if (isFBBundle) {
+    if (__EXPERIMENTAL__) {
+      // We can't currently use the true modern entry point because too many tests fail.
+      // TODO: Fix tests to not use ReactDOM.render or gate them. Then we can remove this.
+      return resolvedEntry;
+    }
+    const resolvedFBEntry = resolvedEntry.replace(
+      '.js',
+      __EXPERIMENTAL__ ? '.modern.fb.js' : '.classic.fb.js'
+    );
+    if (fs.existsSync(resolvedFBEntry)) {
+      return resolvedFBEntry;
+    }
+    const resolvedGenericFBEntry = resolvedEntry.replace('.js', '.fb.js');
+    if (fs.existsSync(resolvedGenericFBEntry)) {
+      return resolvedGenericFBEntry;
+    }
+    // Even if it's a FB bundle we fallthrough to pick stable or experimental if we don't have an FB fork.
+  }
+  const resolvedForkedEntry = resolvedEntry.replace(
+    '.js',
+    __EXPERIMENTAL__ ? '.experimental.js' : '.stable.js'
+  );
+  if (fs.existsSync(resolvedForkedEntry)) {
+    return resolvedForkedEntry;
+  }
+  // Just use the plain .js one.
+  return resolvedEntry;
+}
+
+jest.mock('react', () => {
+  const resolvedEntryPoint = resolveEntryFork(
+    require.resolve('react'),
+    global.__WWW__
+  );
+  return jest.requireActual(resolvedEntryPoint);
+});
+
 jest.mock('react-reconciler/src/ReactFiberReconciler', () => {
   return jest.requireActual(
     __VARIANT__
@@ -85,7 +133,11 @@ inlinedHostConfigs.forEach(rendererInfo => {
   rendererInfo.entryPoints.forEach(entryPoint => {
     jest.mock(entryPoint, () => {
       mockAllConfigs(rendererInfo);
-      return jest.requireActual(entryPoint);
+      const resolvedEntryPoint = resolveEntryFork(
+        require.resolve(entryPoint),
+        global.__WWW__
+      );
+      return jest.requireActual(resolvedEntryPoint);
     });
   });
 });