tests

tests #440

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	15s
Tests (8.1, ubuntu-latest, prefer-stable)	16s
Tests (8.1, macos-latest, prefer-lowest)	1m 15s
Tests (8.1, macos-latest, prefer-stable)	1m 15s
Tests (8.1, windows-latest, prefer-lowest)	38s
Tests (8.1, windows-latest, prefer-stable)	39s
Tests (8.2, ubuntu-latest, prefer-lowest)	13s
Tests (8.2, ubuntu-latest, prefer-stable)	22s
Tests (8.2, macos-latest, prefer-lowest)	1m 23s
Tests (8.2, macos-latest, prefer-stable)	1m 10s
Tests (8.2, windows-latest, prefer-lowest)	38s
Tests (8.2, windows-latest, prefer-stable)	35s
Tests (8.3, ubuntu-latest, prefer-lowest)	12s
Tests (8.3, ubuntu-latest, prefer-stable)	17s
Tests (8.3, macos-latest, prefer-lowest)	1m 14s
Tests (8.3, macos-latest, prefer-stable)	1m 13s
Tests (8.3, windows-latest, prefer-lowest)	42s
Tests (8.3, windows-latest, prefer-stable)	39s
	12m 56s

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