We do have troubles getting our CI to work with Xcode. We encounter the issue Could not determine bundle identifier for xxxTest TEST_HOST: some path that does not exist
In my app I found a solution.
The problem was of course in the test target.
I hope that this solution will work for you too. Go to your test target build settings.
Search for test host.
In my case this testHost was looking like
build/{buildConfigurationName}-iphoneos/{schemeName}.app/{appName}
Which is wrong as the actual path must be
build/{buildConfigurationName}-iphoneos/{schemeName}.app/{schemeName}
so if you have a build configuration called Alpha, in your app named MyApp, with a scheme called MyApp-Alpha the test host path should be
build/Alpha-iphoneos/MyApp-Alpha.app/MyApp-Alpha
it was
build/Alpha-iphoneos/MyApp-Alpha.app/MyApp
I hope this can help... unfortunately this issue appears in many cases.