diff --git a/packages/jest-runtime/src/__tests__/script_transformer.test.js b/packages/jest-runtime/src/__tests__/script_transformer.test.js
index be74d19f9160..b99422f5510a 100644
--- a/packages/jest-runtime/src/__tests__/script_transformer.test.js
+++ b/packages/jest-runtime/src/__tests__/script_transformer.test.js
@@ -39,7 +39,8 @@ jest
     util.createDirectory = jest.fn();
     return util;
   })
-  .mock('vm');
+  .mock('vm')
+  .mock('path', () => jest.requireActual('path').posix);
 
 jest.mock(
   'test_preprocessor',