python-autopage fails to build in Fedora Rawhide.

There is 8 test failures with very similar symptoms:


________________________ InvokePagerTest.test_exception ________________________

self = <autopage.tests.test_end_to_end.InvokePagerTest testMethod=test_exception>

    def test_exception(self) -> None:
        num_lines = 50
        with isolation.isolate(with_exception) as env:
            pager = isolation.PagerControl(env)
    
            lines = num_lines
            while lines > 0:
                expected = min(lines, MAX_LINES_PER_PAGE)
>               self.assertEqual(expected, pager.advance())
E               AssertionError: 23 != 50

autopage/tests/test_end_to_end.py:226: AssertionError
----------------------------- Captured stderr call -----------------------------
Raw output: ['0\n', '1\n', '2\n', '3\n', '4\n', '5\n', '6\n', '7\n', '8\n', '9\n', '10\n', '11\n', '12\n', '13\n', '14\n', '15\n', '16\n', '17\n', '18\n', '19\n', '20\n', '21\n', '22\n', '23\n', '24\n', '25\n', '26\n', '27\n', '28\n', '29\n', '30\n', '31\n', '32\n', '33\n', '34\n', '35\n', '36\n', '37\n', '38\n', '39\n', '40\n', '41\n', '42\n', '43\n', '44\n', '45\n', '46\n', '47\n', '48\n', '49\n']
Recorded output: ['0\n', '1\n', '2\n', '3\n', '4\n', '5\n', '6\n', '7\n', '8\n', '9\n', '10\n', '11\n', '12\n', '13\n', '14\n', '15\n', '16\n', '17\n', '18\n', '19\n', '20\n', '21\n', '22\n', '23\n', '24\n', '25\n', '26\n', '27\n', '28\n', '29\n', '30\n', '31\n', '32\n', '33\n', '34\n', '35\n', '36\n', '37\n', '38\n', '39\n', '40\n', '41\n', '42\n', '43\n', '44\n', '45\n', '46\n', '47\n', '48\n', '49\n']

How to reproduce:
fedpkg mockbuild