tests

tests #427

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	20s
Tests (8.1, ubuntu-latest, prefer-stable)	29s
Tests (8.1, macos-latest, prefer-lowest)	1m 23s
Tests (8.1, macos-latest, prefer-stable)	1m 13s
Tests (8.1, windows-latest, prefer-lowest)	42s
Tests (8.1, windows-latest, prefer-stable)	46s
Tests (8.2, ubuntu-latest, prefer-lowest)	21s
Tests (8.2, ubuntu-latest, prefer-stable)	13s
Tests (8.2, macos-latest, prefer-lowest)	1m 18s
Tests (8.2, macos-latest, prefer-stable)	1m 35s
Tests (8.2, windows-latest, prefer-lowest)	40s
Tests (8.2, windows-latest, prefer-stable)	47s
Tests (8.3, ubuntu-latest, prefer-lowest)	14s
Tests (8.3, ubuntu-latest, prefer-stable)	14s
Tests (8.3, macos-latest, prefer-lowest)	1m 19s
Tests (8.3, macos-latest, prefer-stable)	1m 18s
Tests (8.3, windows-latest, prefer-lowest)	36s
Tests (8.3, windows-latest, prefer-stable)	34s
	14m 2s

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