Unitests (cmd+U) on xcode13 on a ios15 simulator are getting stuck and won't executes XCtests. I've debugged the code and found that it gets stuck on the line: [UIScreen mainScreen] , and won't continue to the next line in my code. It doesn't happen when running the unitests on ios14 simulator, nor when simply running the app (cmd+R) on a ios15 simulator. The UIScreen is part of the UIKIt. Is there a bug in the UIKIt?