You might be getting this error because you renamed your project and Tests
cannot be found anymore. This is easy to fix:
Solve it in Xcode like this:
- Select your project from the project navigator.
- Select
[Your project's Tests]
under targets - Under
General
tab change theHost Application
from the drop down - Build and run.
This problem happened to me because I renamed my project and the tests could’t find it anymore.