tests

tests #277

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	1m 25s
Tests (8.1, ubuntu-latest, prefer-stable)	59s
Tests (8.1, macos-latest, prefer-lowest)	2m 11s
Tests (8.1, macos-latest, prefer-stable)	2m 17s
Tests (8.1, windows-latest, prefer-lowest)	1m 35s
Tests (8.1, windows-latest, prefer-stable)	1m 50s
Tests (8.2, ubuntu-latest, prefer-lowest)	1m 45s
Tests (8.2, ubuntu-latest, prefer-stable)	1m 8s
Tests (8.2, macos-latest, prefer-lowest)	2m 35s
Tests (8.2, macos-latest, prefer-stable)	2m 0s
Tests (8.2, windows-latest, prefer-lowest)	1m 40s
Tests (8.2, windows-latest, prefer-stable)	1m 38s
Tests (8.3, ubuntu-latest, prefer-lowest)	1m 18s
Tests (8.3, ubuntu-latest, prefer-stable)	57s
Tests (8.3, macos-latest, prefer-lowest)	1m 54s
Tests (8.3, macos-latest, prefer-stable)	2m 14s
Tests (8.3, windows-latest, prefer-lowest)	1m 41s
Tests (8.3, windows-latest, prefer-stable)	1m 37s
	30m 44s

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