tests

Fix new mandatory configuration for RTD #6046

Job	Run time
collateral (diffcov)	5m 4s
test (3.9, ubuntu-latest)	4m 29s
collateral (docs)	2m 13s
test_cygwin (39, windows-latest)	13m 0s
test (3.9, windows-latest)	11m 38s
test (3.13, ubuntu-latest)	4m 43s
test (3.13, macos-latest)	4m 50s
test (3.13, windows-latest)	9m 37s
test (3.10, ubuntu-latest)	4m 19s
test (3.11, ubuntu-latest)	4m 22s
test (3.12, ubuntu-latest)	5m 24s
test (3.14, ubuntu-latest)	6m 25s
test (pypy3.10, ubuntu-latest, stdlib)	16m 45s
test (ubuntu-latest, 3.10, stdlib)	4m 8s
integration-test	0s
check	2s
release	0s
	1h 36m 59s

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