Debug failing CI #3554

Job	Run time
test (3.8, ubuntu-latest)	4m 30s
diffcov	6m 41s
test (3.8, macos-latest)	10m 29s
test_cygwin (39, windows-latest)	16m 22s
test (3.8, windows-latest)	10m 51s
test (3.11, ubuntu-latest)	4m 16s
test (3.11, macos-latest)	8m 22s
docs	42s
test (3.11, windows-latest)	12m 1s
test (3.12, ubuntu-latest)	6m 48s
test (3.12, macos-latest)	11m 10s
test (3.12, windows-latest)	12m 36s
test (3.9, ubuntu-latest)	4m 34s
test (3.10, ubuntu-latest)	4m 33s
test (pypy3.9, ubuntu-latest, stdlib)	6m 29s
test (ubuntu-latest, 3.10, stdlib)	4m 15s
integration-test	0s
check	3s
release	0s
	2h 4m 42s

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