Its status page says "Meter: no reading for N seconds, limit 30 seconds" when N passes 30; N is about half the file's run time. It failed alone under --cpus 0.15 (94 s), in a loaded local parallel run (103 s) and in a loaded CI run (112 s, run 1434). Idle it takes ~25 s. No test file changed, so it runs alone after the parallel batch, like test_loop.py and test_freeze.py. Co-Authored-By: Claude <noreply@anthropic.com>