tests

tests #270

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	1m 22s
Tests (8.1, ubuntu-latest, prefer-stable)	1m 19s
Tests (8.1, macos-latest, prefer-lowest)	2m 2s
Tests (8.1, macos-latest, prefer-stable)	1m 58s
Tests (8.1, windows-latest, prefer-lowest)	1m 36s
Tests (8.1, windows-latest, prefer-stable)	1m 40s
Tests (8.2, ubuntu-latest, prefer-lowest)	1m 18s
Tests (8.2, ubuntu-latest, prefer-stable)	59s
Tests (8.2, macos-latest, prefer-lowest)	2m 0s
Tests (8.2, macos-latest, prefer-stable)	1m 51s
Tests (8.2, windows-latest, prefer-lowest)	1m 35s
Tests (8.2, windows-latest, prefer-stable)	1m 42s
Tests (8.3, ubuntu-latest, prefer-lowest)	1m 17s
Tests (8.3, ubuntu-latest, prefer-stable)	1m 0s
Tests (8.3, macos-latest, prefer-lowest)	1m 57s
Tests (8.3, macos-latest, prefer-stable)	2m 10s
Tests (8.3, windows-latest, prefer-lowest)	1m 47s
Tests (8.3, windows-latest, prefer-stable)	1m 42s
	29m 15s

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