tests

tests #510

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	18s
Tests (8.1, ubuntu-latest, prefer-stable)	23s
Tests (8.1, macos-latest, prefer-lowest)	1m 27s
Tests (8.1, macos-latest, prefer-stable)	1m 19s
Tests (8.1, windows-latest, prefer-lowest)	40s
Tests (8.1, windows-latest, prefer-stable)	41s
Tests (8.2, ubuntu-latest, prefer-lowest)	15s
Tests (8.2, ubuntu-latest, prefer-stable)	16s
Tests (8.2, macos-latest, prefer-lowest)	1m 13s
Tests (8.2, macos-latest, prefer-stable)	1m 12s
Tests (8.2, windows-latest, prefer-lowest)	38s
Tests (8.2, windows-latest, prefer-stable)	40s
Tests (8.3, ubuntu-latest, prefer-lowest)	14s
Tests (8.3, ubuntu-latest, prefer-stable)	21s
Tests (8.3, macos-latest, prefer-lowest)	1m 20s
Tests (8.3, macos-latest, prefer-stable)	1m 16s
Tests (8.3, windows-latest, prefer-lowest)	35s
Tests (8.3, windows-latest, prefer-stable)	41s
	13m 29s

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