I just upgraded to Xcode 7.2 and now my tests succeed without even running. As soon as it finishes building, it gives me the "Test Succeeded" message and the console shows no output.
Is anyone else having this issue?
UPDATE: So it looks like it's not working only on one specific device, which is an iPAD AIR 2, and the UI Test platform doesn't even install onto the device. It doesn't work on 2 separate machines both with Xcode 7.2.
The issue was resolved when I updated my device to iOS 9.2. I don't see why this could've been the issue seeing all my other devices managed to run tests fine on 9.1.
I had the same issue with Xcode 7.3.1 and iOS 9.3.1. Rebooting the iOS device solved my problem.