tests

tests #526

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	14s
Tests (8.1, ubuntu-latest, prefer-stable)	20s
Tests (8.1, macos-latest, prefer-lowest)	2m 28s
Tests (8.1, macos-latest, prefer-stable)	1m 14s
Tests (8.1, windows-latest, prefer-lowest)	37s
Tests (8.1, windows-latest, prefer-stable)	42s
Tests (8.2, ubuntu-latest, prefer-lowest)	14s
Tests (8.2, ubuntu-latest, prefer-stable)	15s
Tests (8.2, macos-latest, prefer-lowest)	1m 10s
Tests (8.2, macos-latest, prefer-stable)	1m 40s
Tests (8.2, windows-latest, prefer-lowest)	51s
Tests (8.2, windows-latest, prefer-stable)	38s
Tests (8.3, ubuntu-latest, prefer-lowest)	16s
Tests (8.3, ubuntu-latest, prefer-stable)	22s
Tests (8.3, macos-latest, prefer-lowest)	1m 8s
Tests (8.3, macos-latest, prefer-stable)	1m 18s
Tests (8.3, windows-latest, prefer-lowest)	35s
Tests (8.3, windows-latest, prefer-stable)	36s
	14m 38s

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