Xcode 7 - Code coverage data generation failed

Question

When I run my tests I get an error:

Code coverage data generation failed.
Unable to retrieve the profile data files from \'UIDevice\'.

Answer 1

One or more of your simulators has gotten stuck. The only thing that always works to fix this for me is to reset the simulator content and settings from the Simulator menu.

Note: this will delete all app data from the simulator.