diff --git a/react-packager/src/Resolver/__tests__/Resolver-test.js b/react-packager/src/Resolver/__tests__/Resolver-test.js
index 6712f00b..82184c61 100644
--- a/react-packager/src/Resolver/__tests__/Resolver-test.js
+++ b/react-packager/src/Resolver/__tests__/Resolver-test.js
@@ -10,6 +10,7 @@
 
 jest.dontMock('../')
   .dontMock('underscore')
+  .dontMock('PixelRatio')
   .dontMock('../../DependencyResolver/lib/extractRequires')
   .dontMock('../../DependencyResolver/lib/replacePatterns');