tests

tests #264

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	1m 31s
Tests (8.1, ubuntu-latest, prefer-stable)	1m 14s
Tests (8.1, macos-latest, prefer-lowest)	5m 9s
Tests (8.1, macos-latest, prefer-stable)	5m 48s
Tests (8.1, windows-latest, prefer-lowest)	1m 39s
Tests (8.1, windows-latest, prefer-stable)	1m 44s
Tests (8.2, ubuntu-latest, prefer-lowest)	1m 36s
Tests (8.2, ubuntu-latest, prefer-stable)	1m 9s
Tests (8.2, macos-latest, prefer-lowest)	4m 41s
Tests (8.2, macos-latest, prefer-stable)	5m 1s
Tests (8.2, windows-latest, prefer-lowest)	1m 43s
Tests (8.2, windows-latest, prefer-stable)	1m 40s
Tests (8.3, ubuntu-latest, prefer-lowest)	1m 20s
Tests (8.3, ubuntu-latest, prefer-stable)	1m 6s
Tests (8.3, macos-latest, prefer-lowest)	6m 2s
Tests (8.3, macos-latest, prefer-stable)	4m 45s
Tests (8.3, windows-latest, prefer-lowest)	1m 41s
Tests (8.3, windows-latest, prefer-stable)	1m 38s
	49m 27s

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