diff --git a/.eslintrc.js b/.eslintrc.js
index 0bc90137a5c7d..c272cfcd4a4ad 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -59,7 +59,7 @@ module.exports = {
     'space-before-blocks': ERROR,
     'space-before-function-paren': OFF,
     'valid-typeof': [ERROR, {requireStringLiterals: true}],
-    // Flow fails with with non-string literal keys
+    // Flow fails with non-string literal keys
     'no-useless-computed-key': OFF,
 
     // We apply these settings to files that should run on Node.
diff --git a/packages/jest-react/src/internalAct.js b/packages/jest-react/src/internalAct.js
index a5a398b7e2a0d..84ee25b7617ed 100644
--- a/packages/jest-react/src/internalAct.js
+++ b/packages/jest-react/src/internalAct.js
@@ -139,7 +139,7 @@ function flushActWork(resolve, reject) {
   // Once the scheduler queue is empty, run all the timers. The purpose of this
   // is to force any pending fallbacks to commit. The public version of act does
   // this with dev-only React runtime logic, but since our internal act needs to
-  // work work production builds of React, we have to cheat.
+  // work production builds of React, we have to cheat.
   // $FlowFixMe: Flow doesn't know about global Jest object
   jest.runOnlyPendingTimers();
   if (Scheduler.unstable_hasPendingWork()) {
diff --git a/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js b/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js
index 919fbb059f76b..7002c3ba1b8db 100644
--- a/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js
+++ b/packages/react-devtools-shared/src/__tests__/inspectedElement-test.js
@@ -889,7 +889,7 @@ describe('InspectedElement', () => {
     `);
   });
 
-  it('should support objects with with inherited keys', async () => {
+  it('should support objects with inherited keys', async () => {
     const Example = () => null;
 
     const base = Object.create(Object.prototype, {
diff --git a/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js b/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
index 1ace87653848d..3486b0896e075 100644
--- a/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
+++ b/packages/react-devtools-shared/src/__tests__/legacy/inspectElement-test.js
@@ -478,7 +478,7 @@ describe('InspectedElementContext', () => {
   });
 
   // @reactVersion >= 16.0
-  it('should support objects with with inherited keys', async () => {
+  it('should support objects with inherited keys', async () => {
     const Example = () => null;
 
     const base = Object.create(Object.prototype, {
diff --git a/packages/react-dom/src/events/ReactDOMEventListener.js b/packages/react-dom/src/events/ReactDOMEventListener.js
index e2974586ec6ac..bd7e05b1d760e 100644
--- a/packages/react-dom/src/events/ReactDOMEventListener.js
+++ b/packages/react-dom/src/events/ReactDOMEventListener.js
@@ -225,7 +225,7 @@ function dispatchEventOriginal(
 
   if (allowReplay) {
     if (isDiscreteEventThatRequiresHydration(domEventName)) {
-      // This this to be replayed later once the target is available.
+      // This to be replayed later once the target is available.
       queueDiscreteEvent(
         blockedOn,
         domEventName,
diff --git a/packages/react-test-renderer/src/__tests__/ReactShallowRendererHooks-test.js b/packages/react-test-renderer/src/__tests__/ReactShallowRendererHooks-test.js
index 811768f2a0c13..64854d3d6d6de 100644
--- a/packages/react-test-renderer/src/__tests__/ReactShallowRendererHooks-test.js
+++ b/packages/react-test-renderer/src/__tests__/ReactShallowRendererHooks-test.js
@@ -356,7 +356,7 @@ describe('ReactShallowRenderer with hooks', () => {
     );
   });
 
-  it('should work with with forwardRef + any hook', () => {
+  it('should work with forwardRef + any hook', () => {
     const SomeComponent = React.forwardRef((props, ref) => {
       const randomNumberRef = React.useRef({number: Math.random()});