Run tests / Fix race condition. #2346

Job	Run time
test-linux (ubuntu-24.04-arm)	55m 53s
test-macos (arm64)	54m 53s
test-linux (ubuntu-latest)	1h 2m 33s
test-pack	4m 27s
spellcheck-docs	15s
test-windows-core (windows-11-arm)	57m 52s
test-windows-full (windows-latest)	48m 13s
test-windows-core (windows-latest)	1h 12m 2s
test-windows-full (windows-11-arm)	29m 34s
test-macos (x64)	1h 20m 20s
	7h 46m 2s

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