diff --git a/packages/react-scripts/config/webpack.config.dev.js b/packages/react-scripts/config/webpack.config.dev.js
index 44b5f5c4f0..7536b13892 100644
--- a/packages/react-scripts/config/webpack.config.dev.js
+++ b/packages/react-scripts/config/webpack.config.dev.js
@@ -94,7 +94,9 @@ module.exports = {
     // We also include JSX as a common component filename extension to support
     // some tools, although we do not recommend using it, see:
     // https://github.com/facebookincubator/create-react-app/issues/290
-    extensions: ['.js', '.json', '.jsx'],
+    // `web` extension prefixes have been added for better support
+    // for React Native Web.
+    extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
     alias: {
       // @remove-on-eject-begin
       // Resolve Babel runtime relative to react-scripts.
diff --git a/packages/react-scripts/config/webpack.config.prod.js b/packages/react-scripts/config/webpack.config.prod.js
index e7995d8f72..f31fd3ebf9 100644
--- a/packages/react-scripts/config/webpack.config.prod.js
+++ b/packages/react-scripts/config/webpack.config.prod.js
@@ -94,7 +94,9 @@ module.exports = {
     // We also include JSX as a common component filename extension to support
     // some tools, although we do not recommend using it, see:
     // https://github.com/facebookincubator/create-react-app/issues/290
-    extensions: ['.js', '.json', '.jsx'],
+    // `web` extension prefixes have been added for better support
+    // for React Native Web.
+    extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
     alias: {
       // @remove-on-eject-begin
       // Resolve Babel runtime relative to react-scripts.
diff --git a/packages/react-scripts/scripts/utils/createJestConfig.js b/packages/react-scripts/scripts/utils/createJestConfig.js
index 13ae8b3041..de74958efa 100644
--- a/packages/react-scripts/scripts/utils/createJestConfig.js
+++ b/packages/react-scripts/scripts/utils/createJestConfig.js
@@ -43,6 +43,7 @@ module.exports = (resolve, rootDir, isEjecting) => {
     moduleNameMapper: {
       '^react-native$': 'react-native-web',
     },
+    moduleFileExtensions: ['web.js', 'js', 'json', 'web.jsx', 'jsx'],
   };
   if (rootDir) {
     config.rootDir = rootDir;