When running my project in XCode, my tests gives this error:
target specifies product type \'com.apple.product-type.bundle.unit-test\', but there\'s no such
It looks like Xcode 6 changed the product identifier for ocunit test bundles from com.apple.product-type.bundle to com.apple.product-type.bundle.ocunit-test.
Edit $(ProjectName).xcodeproj/project.pbxproj and replace any instance of com.apple.product-type.bundle.ocunit-test with com.apple.product-type.bundle. For now you will need to do this any time you open your project with Xcode 6 and then want to open it in Xcode 5.
What Worked for me was: