Fix regression test #72

Job	Run time
Type check	31s
Format and lint	14s
Test: Python 3.7 on ubuntu-20.04	20s
Test: Python 3.8 on ubuntu-20.04	19s
Test: Python 3.9 on ubuntu-20.04	19s
Test: Python 3.10 on ubuntu-20.04	28s
Test: Python 3.11 on ubuntu-20.04	28s
Test: Python 3.12 on ubuntu-20.04	23s
Test: Python 3.13 on ubuntu-20.04	29s
Test: Python pypy-3.9 on ubuntu-20.04	46s
Test: Python pypy-3.10 on ubuntu-20.04	50s
Test: Python 3.8 on macos-latest	1m 0s
Test: Python 3.9 on macos-latest	46s
Test: Python 3.10 on macos-latest	38s
Test: Python 3.11 on macos-latest	24s
Test: Python 3.12 on macos-latest	23s
Test: Python 3.13 on macos-latest	23s
Test: Python pypy-3.9 on macos-latest	48s
Test: Python pypy-3.10 on macos-latest	50s
Test: Python 3.8 on windows-latest	1m 6s
Test: Python 3.9 on windows-latest	1m 14s
Test: Python 3.10 on windows-latest	1m 9s
Test: Python 3.11 on windows-latest	1m 14s
Test: Python 3.12 on windows-latest	1m 12s
Test: Python 3.13 on windows-latest	2m 5s
	18m 19s

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