diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
index 00d38a2cbe8d8..ac420850fae82 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
@@ -2668,7 +2668,7 @@ if (__DEV__ && replayFailedUnitOfWorkWithInvokeGuardedCallback) {
         }
       }
       // We always throw the original error in case the second render pass is not idempotent.
-      // This can happen if a memoized function or CommonJS module doesn't throw after first invokation.
+      // This can happen if a memoized function or CommonJS module doesn't throw after first invocation.
       throw originalError;
     }
   };
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
index 2561d865b0e80..c98c7abac71fe 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
@@ -2668,7 +2668,7 @@ if (__DEV__ && replayFailedUnitOfWorkWithInvokeGuardedCallback) {
         }
       }
       // We always throw the original error in case the second render pass is not idempotent.
-      // This can happen if a memoized function or CommonJS module doesn't throw after first invokation.
+      // This can happen if a memoized function or CommonJS module doesn't throw after first invocation.
       throw originalError;
     }
   };
diff --git a/packages/react-reconciler/src/__tests__/ReactCache-test.js b/packages/react-reconciler/src/__tests__/ReactCache-test.js
index 4f6caa4c6a80e..77b77869c782c 100644
--- a/packages/react-reconciler/src/__tests__/ReactCache-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactCache-test.js
@@ -461,7 +461,7 @@ describe('ReactCache', () => {
     expect(Scheduler).toHaveYielded(['A [v1]']);
     expect(root).toMatchRenderedOutput('A [v1]');
 
-    // Fefresh for new data.
+    // Refresh for new data.
     await act(async () => {
       startTransition(() => refresh());
     });
diff --git a/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js b/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js
index 2d6ad2a97524e..716771a3778dd 100644
--- a/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js
+++ b/packages/react-reconciler/src/__tests__/ReactIncrementalErrorHandling-test.internal.js
@@ -990,7 +990,7 @@ describe('ReactIncrementalErrorHandling', () => {
     expect(Scheduler).toFlushAndYield(['Foo']);
   });
 
-  it('can schedule updates after uncaught error during umounting', () => {
+  it('can schedule updates after uncaught error during unmounting', () => {
     class BrokenComponentWillUnmount extends React.Component {
       render() {
         return <div />;
diff --git a/packages/react-reconciler/src/__tests__/ReactSuspenseEffectsSemantics-test.js b/packages/react-reconciler/src/__tests__/ReactSuspenseEffectsSemantics-test.js
index 6cb3c60971538..bdda4f8313dfa 100644
--- a/packages/react-reconciler/src/__tests__/ReactSuspenseEffectsSemantics-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactSuspenseEffectsSemantics-test.js
@@ -1019,7 +1019,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
       await advanceTimers(1000);
 
       // Timing out should commit the fallback and destroy inner layout effects.
-      // Even though the innermost layout effects are beneat a hidden HostComponent.
+      // Even though the innermost layout effects are beneath a hidden HostComponent.
       expect(Scheduler).toHaveYielded([
         'Text:Outer destroy layout',
         'Text:MemoizedInner destroy layout',
@@ -1147,7 +1147,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
         span('OuterFallback'),
       ]);
 
-      // Show the inner Susepnse subtree (no effects should be recreated)
+      // Show the inner Suspense subtree (no effects should be recreated)
       await act(async () => {
         await resolveText('InnerAsync_1');
       });
@@ -1189,7 +1189,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
         span('OuterFallback'),
       ]);
 
-      // Show the outer Susepnse subtree (only outer effects should be recreated)
+      // Show the outer Suspense subtree (only outer effects should be recreated)
       await act(async () => {
         await resolveText('OuterAsync_1');
       });
@@ -1213,7 +1213,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
         span('InnerFallback'),
       ]);
 
-      // Show the inner Susepnse subtree (only inner effects should be recreated)
+      // Show the inner Suspense subtree (only inner effects should be recreated)
       await act(async () => {
         await resolveText('InnerAsync_2');
       });
@@ -1517,7 +1517,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
         span('Outside'),
       ]);
 
-      // Resolving both resources should cleanup fallabck effects and recreate main effects
+      // Resolving both resources should cleanup fallback effects and recreate main effects
       await act(async () => {
         await resolveText('FallbackAsync');
         await resolveText('OutsideAsync');
@@ -1974,7 +1974,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
           'ThrowsInWillUnmount componentWillUnmount',
           'Text:Inside destroy layout',
 
-          // Finish the in-progess commit
+          // Finish the in-progress commit
           'Text:Fallback create layout',
           'Text:Fallback create passive',
 
@@ -2114,7 +2114,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
           'ThrowsInLayoutEffect useLayoutEffect create',
           'Text:Inside create layout',
 
-          // Finish the in-progess commit
+          // Finish the in-progress commit
           'Text:Fallback destroy passive',
           'AsyncText:Async create passive',
 
@@ -2139,7 +2139,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
       // @gate enableSuspenseLayoutEffectSemantics
       // @gate enableCache
       // @gate replayFailedUnitOfWorkWithInvokeGuardedCallback
-      it('are properly handled for layout effect descruction', async () => {
+      it('are properly handled for layout effect destruction', async () => {
         function ThrowsInLayoutEffectDestroy() {
           Scheduler.unstable_yieldValue('ThrowsInLayoutEffectDestroy render');
           React.useLayoutEffect(() => {
@@ -2226,7 +2226,7 @@ describe('ReactSuspenseEffectsSemantics', () => {
           'ThrowsInLayoutEffectDestroy useLayoutEffect destroy',
           'Text:Inside destroy layout',
 
-          // Finish the in-progess commit
+          // Finish the in-progress commit
           'Text:Fallback create layout',
           'Text:Fallback create passive',
 
diff --git a/packages/react-reconciler/src/__tests__/ReactSuspenseWithNoopRenderer-test.js b/packages/react-reconciler/src/__tests__/ReactSuspenseWithNoopRenderer-test.js
index 960c52506ab03..6c0b4076e6187 100644
--- a/packages/react-reconciler/src/__tests__/ReactSuspenseWithNoopRenderer-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactSuspenseWithNoopRenderer-test.js
@@ -1628,7 +1628,7 @@ describe('ReactSuspenseWithNoopRenderer', () => {
       });
       expect(root).toMatchRenderedOutput('Loading...');
 
-      // Unmount everying
+      // Unmount everything
       await act(async () => {
         root.render(null);
       });
@@ -2677,7 +2677,7 @@ describe('ReactSuspenseWithNoopRenderer', () => {
     });
   });
 
-  describe('delays transitions when using React.startTranistion', () => {
+  describe('delays transitions when using React.startTransition', () => {
     // @gate enableCache
     it('top level render', async () => {
       function App({page}) {
@@ -3360,7 +3360,7 @@ describe('ReactSuspenseWithNoopRenderer', () => {
         // In the expiration times model, once the high pri update suspends,
         // we can't be sure if there's additional work at a lower priority
         // that might unblock the tree. We do know that there's a lower
-        // priority update *somehwere* in the entire root, though (the update
+        // priority update *somewhere* in the entire root, though (the update
         // to the fallback). So we try rendering one more time, just in case.
         // TODO: We shouldn't need to do this with lanes, because we always
         // know exactly which lanes have pending work in each tree.
diff --git a/packages/react-reconciler/src/__tests__/ReactUpdatePriority-test.js b/packages/react-reconciler/src/__tests__/ReactUpdatePriority-test.js
index 4e3b44df255dd..44cd0860a5c65 100644
--- a/packages/react-reconciler/src/__tests__/ReactUpdatePriority-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactUpdatePriority-test.js
@@ -54,8 +54,8 @@ describe('ReactUpdatePriority', () => {
     let setDefaultState;
     function App() {
       const [idleState, setIdleState] = useState(1);
-      const [defaultState, _setDetaultState] = useState(1);
-      setDefaultState = _setDetaultState;
+      const [defaultState, _setDefaultState] = useState(1);
+      setDefaultState = _setDefaultState;
       useEffect(() => {
         Scheduler.unstable_yieldValue('Idle update');
         setIdleState(2);
@@ -86,7 +86,7 @@ describe('ReactUpdatePriority', () => {
     expect(Scheduler).toHaveYielded(['Idle: 2, Default: 2']);
   });
 
-  test('continuous updates should interrupt transisions', async () => {
+  test('continuous updates should interrupt transitions', async () => {
     const root = ReactNoop.createRoot();
 
     let setCounter;