diff --git a/packages/react-dom/src/__tests__/ReactDOMServerIntegration-test.js b/packages/react-dom/src/__tests__/ReactDOMServerIntegration-test.js
index 984980b5c8..203de48939 100644
--- a/packages/react-dom/src/__tests__/ReactDOMServerIntegration-test.js
+++ b/packages/react-dom/src/__tests__/ReactDOMServerIntegration-test.js
@@ -17,7 +17,6 @@ let ReactDOMServer;
 let ReactTestUtils;
 
 const stream = require('stream');
-const ReactFeatureFlags = require('shared/ReactFeatureFlags');
 
 const TEXT_NODE_TYPE = 3;
 
diff --git a/packages/react-dom/src/events/ReactDOMEventListener.js b/packages/react-dom/src/events/ReactDOMEventListener.js
index b67114cfde..ae34fd827d 100644
--- a/packages/react-dom/src/events/ReactDOMEventListener.js
+++ b/packages/react-dom/src/events/ReactDOMEventListener.js
@@ -11,7 +11,6 @@ var ReactGenericBatching = require('events/ReactGenericBatching');
 var ReactFiberTreeReflection = require('shared/ReactFiberTreeReflection');
 var ReactTypeOfWork = require('shared/ReactTypeOfWork');
 var EventListener = require('fbjs/lib/EventListener');
-var warning = require('fbjs/lib/warning');
 var {HostRoot} = ReactTypeOfWork;
 
 var getEventTarget = require('./getEventTarget');
diff --git a/packages/react-reconciler/src/__tests__/ReactFragment-test.js b/packages/react-reconciler/src/__tests__/ReactFragment-test.js
index 0a51937b4c..90b4acc115 100644
--- a/packages/react-reconciler/src/__tests__/ReactFragment-test.js
+++ b/packages/react-reconciler/src/__tests__/ReactFragment-test.js
@@ -8,8 +8,6 @@
  */
 'use strict';
 
-var ReactFeatureFlags = require('shared/ReactFeatureFlags');
-
 let React;
 let ReactNoop;
 
diff --git a/packages/react/src/__tests__/ReactJSXElementValidator-test.js b/packages/react/src/__tests__/ReactJSXElementValidator-test.js
index 914ce78c87..047dc48609 100644
--- a/packages/react/src/__tests__/ReactJSXElementValidator-test.js
+++ b/packages/react/src/__tests__/ReactJSXElementValidator-test.js
@@ -9,8 +9,6 @@
 
 'use strict';
 
-var ReactFeatureFlags = require('shared/ReactFeatureFlags');
-
 // TODO: All these warnings should become static errors using Flow instead
 // of dynamic errors when using JSX with Flow.
 var React;