diff --git a/scripts/eject.js b/scripts/eject.js
index 6e609c4f9f1..701907fa436 100644
--- a/scripts/eject.js
+++ b/scripts/eject.js
@@ -129,7 +129,7 @@ prompt(
   // Add Jest config
   console.log('  Adding ' + cyan('Jest') + ' configuration');
   appPackage.jest = createJestConfig(
-    filePath => path.join('<rootDir>', filePath),
+    filePath => path.posix.join('<rootDir>', filePath),
     null,
     true
   );
diff --git a/scripts/test.js b/scripts/test.js
index 9de5181d739..1a408215d66 100644
--- a/scripts/test.js
+++ b/scripts/test.js
@@ -32,7 +32,7 @@ const createJestConfig = require('../utils/createJestConfig');
 const path = require('path');
 const paths = require('../config/paths');
 argv.push('--config', JSON.stringify(createJestConfig(
-  relativePath => path.resolve(__dirname, '..', relativePath),
+  relativePath => path.posix.resolve(__dirname.replace(/[\\]+/g, path.posix.sep), '..', relativePath),
   path.resolve(paths.appSrc, '..'),
   false
 )));