test_stable_marriage_produces_symmetric_matchings[build_full] hypothesis.errors.Flaky: Hypothesis test_stable_marriage_produces_symmetric_matchings(request=<FixtureRequest for <Function test_stable_marriage_produces_symmetric_matchings[build_full]>>, caplog_context=make_caplog_context, build_func=build_full, searches=[Search(['p0', 'p1'], -1482.4390060606343), Search(['p0', 'p1'], -4.34998), Search(['p0', 'p1'], -5.850015, has_newbie), Search(['p0', 'p1'], -267.4470718740855), Search(['p0', 'p1'], 1224.9836171193372), Search(['p0', 'p1'], -489.6878792900092), Search(['p0', 'p1'], -193.44785274284152), Search(['p0', 'p1'], -2.8514999999999997)]) produces unreliable results: Falsified on the first call but did not on a subsequent one Falsifying example: test_stable_marriage_produces_symmetric_matchings( request=<FixtureRequest for <Function test_stable_marriage_produces_symmetric_matchings[build_full]>>, caplog_context=make_caplog_context, build_func=build_full, searches=[Search(['p0', 'p1'], -1482.4390060606343), Search(['p0', 'p1'], -4.34998), Search(['p0', 'p1'], -5.850015, has_newbie), Search(['p0', 'p1'], -267.4470718740855), Search(['p0', 'p1'], 1224.9836171193372), Search(['p0', 'p1'], -489.6878792900092), Search(['p0', 'p1'], -193.44785274284152), Search(['p0', 'p1'], -2.8514999999999997)], ) Unreliable test timings! On an initial run, this test took 430.38ms, which exceeded the deadline of 300.00ms, but on a subsequent run it took 8.27 ms, which did not. If you expect this sort of variability in your test timings, consider turning deadlines off for this test by setting deadline=None. You can reproduce this example by temporarily adding @reproduce_failure('6.92.2', b'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') as a decorator on your test case