Test win32 flakes with leaked streams #468

Job	Run time
checks / readme-snippets	10s
checks / pre-commit	38s
checks / test (3.10, lowest-direct, windows-latest)	2m 39s
checks / test (3.11, lowest-direct, ubuntu-latest)	53s
checks / test (3.12, locked, ubuntu-latest)	50s
checks / test (3.12, lowest-direct, ubuntu-latest)	59s
checks / test (3.12, lowest-direct, windows-latest)	4m 5s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 17s
checks / test (3.10, locked, ubuntu-latest)	46s
checks / test (3.11, locked, windows-latest)	2m 39s
checks / test (3.10, lowest-direct, ubuntu-latest)	56s
checks / test (3.11, locked, ubuntu-latest)	52s
checks / test (3.13, lowest-direct, ubuntu-latest)	53s
checks / test (3.14, locked, windows-latest)	3m 41s
checks / test (3.12, locked, windows-latest)	3m 20s
checks / test (3.13, lowest-direct, windows-latest)	2m 54s
checks / test (3.14, lowest-direct, windows-latest)	2m 18s
checks / test (3.14, locked, ubuntu-latest)	2m 22s
checks / test (3.13, locked, ubuntu-latest)	47s
checks / test (3.11, lowest-direct, windows-latest)	3m 17s
checks / test (3.10, locked, windows-latest)	2m 16s
checks / test (3.13, locked, windows-latest)	2m 59s
all-green	5s
	41m 36s

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