Test intended behavior

Author: eps1lon

packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js

@@ -2380,8 +2380,7 @@ describe('ReactDOMFizzServer', () => {
     expect(() => {
       expect(Scheduler).toFlushAndYield([
         'Nay!',
-        // Missing flushAndYield
-        // 'Yay!'
+        'Yay!'
       ]);
     }).toErrorDev([]);
   });