tests

tests #501

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	26s
Tests (8.1, ubuntu-latest, prefer-stable)	42s
Tests (8.1, macos-latest, prefer-lowest)	1m 12s
Tests (8.1, macos-latest, prefer-stable)	1m 26s
Tests (8.1, windows-latest, prefer-lowest)	39s
Tests (8.1, windows-latest, prefer-stable)	38s
Tests (8.2, ubuntu-latest, prefer-lowest)	13s
Tests (8.2, ubuntu-latest, prefer-stable)	16s
Tests (8.2, macos-latest, prefer-lowest)	1m 20s
Tests (8.2, macos-latest, prefer-stable)	1m 8s
Tests (8.2, windows-latest, prefer-lowest)	47s
Tests (8.2, windows-latest, prefer-stable)	41s
Tests (8.3, ubuntu-latest, prefer-lowest)	21s
Tests (8.3, ubuntu-latest, prefer-stable)	13s
Tests (8.3, macos-latest, prefer-lowest)	1m 25s
Tests (8.3, macos-latest, prefer-stable)	1m 20s
Tests (8.3, windows-latest, prefer-lowest)	32s
Tests (8.3, windows-latest, prefer-stable)	38s
	13m 57s

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