test_matching_graph_symmetric[build_fast] hypothesis.errors.Flaky: Hypothesis test_matching_graph_symmetric(request=<FixtureRequest for <Function test_matching_graph_symmetric[build_fast]>>, caplog_context=make_caplog_context, build_func=build_fast, searches=[Search(['p0'], -1.5), Search(['p0'], -0.003), Search(['p0'], -0.003), Search(['p0'], -1384.2469706299032), Search(['p0'], -0.003, has_newbie), Search(['p0'], -1384.2469706299032)]) produces unreliable results: Falsified on the first call but did not on a subsequent one Falsifying example: test_matching_graph_symmetric( request=<FixtureRequest for <Function test_matching_graph_symmetric[build_fast]>>, caplog_context=make_caplog_context, build_func=build_fast, searches=[Search(['p0'], -1.5), Search(['p0'], -0.003), Search(['p0'], -0.003), Search(['p0'], -1384.2469706299032), Search(['p0'], -0.003, has_newbie), Search(['p0'], -1384.2469706299032)], ) Unreliable test timings! On an initial run, this test took 441.04ms, which exceeded the deadline of 300.00ms, but on a subsequent run it took 2.33 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'AXicY2BjZGKAAVZ2ZoYDULYBYwUjsyEzMxOrBiPbAQZGFVbG4xcgUhysDAcm/4z4slslQZTZmZGlmJF5KjMDC3YVfkxXGdkOM7LdYmKxZmAVYGdkOOkAUcTIwOD3TT7kxtadAgwNPTcZz+wTC3NkmM/IdJ+R4TIj0xcGFhtVZsbjd+ekohlZBdTLFsbEeodE8xgAzHc3aA==') as a decorator on your test case