tests

Improve feature toggling exception for type offsets #535

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	22s
Tests (8.1, ubuntu-latest, prefer-stable)	15s
Tests (8.1, macos-latest, prefer-lowest)	1m 9s
Tests (8.1, macos-latest, prefer-stable)	1m 17s
Tests (8.1, windows-latest, prefer-lowest)	38s
Tests (8.1, windows-latest, prefer-stable)	47s
Tests (8.2, ubuntu-latest, prefer-lowest)	23s
Tests (8.2, ubuntu-latest, prefer-stable)	16s
Tests (8.2, macos-latest, prefer-lowest)	1m 22s
Tests (8.2, macos-latest, prefer-stable)	1m 16s
Tests (8.2, windows-latest, prefer-lowest)	43s
Tests (8.2, windows-latest, prefer-stable)	45s
Tests (8.3, ubuntu-latest, prefer-lowest)	14s
Tests (8.3, ubuntu-latest, prefer-stable)	22s
Tests (8.3, macos-latest, prefer-lowest)	1m 22s
Tests (8.3, macos-latest, prefer-stable)	1m 5s
Tests (8.3, windows-latest, prefer-lowest)	37s
Tests (8.3, windows-latest, prefer-stable)	39s
	13m 32s

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