tests

tests #442

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	20s
Tests (8.1, ubuntu-latest, prefer-stable)	17s
Tests (8.1, macos-latest, prefer-lowest)	1m 30s
Tests (8.1, macos-latest, prefer-stable)	1m 26s
Tests (8.1, windows-latest, prefer-lowest)	39s
Tests (8.1, windows-latest, prefer-stable)	45s
Tests (8.2, ubuntu-latest, prefer-lowest)	16s
Tests (8.2, ubuntu-latest, prefer-stable)	13s
Tests (8.2, macos-latest, prefer-lowest)	1m 21s
Tests (8.2, macos-latest, prefer-stable)	1m 18s
Tests (8.2, windows-latest, prefer-lowest)	43s
Tests (8.2, windows-latest, prefer-stable)	45s
Tests (8.3, ubuntu-latest, prefer-lowest)	15s
Tests (8.3, ubuntu-latest, prefer-stable)	21s
Tests (8.3, macos-latest, prefer-lowest)	1m 16s
Tests (8.3, macos-latest, prefer-stable)	1m 21s
Tests (8.3, windows-latest, prefer-lowest)	39s
Tests (8.3, windows-latest, prefer-stable)	34s
	13m 59s

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