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'], 609.9726798821683), Search(['p0'], -0.003), Search(['p0'], -1500.4999999999998), Search(['p0'], -1499.9999999999998), Search(['p0'], -2.9999700000000002), Search(['p0'], -0.003), Search(['p0'], -71.4107169971501), Search(['p0'], -3.0029999999999997), Search(['p0'], -251.60762597496253), Search(['p0'], -936.0580133450828), Search(['p0'], -1497.0)]) 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'], 609.9726798821683), Search(['p0'], -0.003), Search(['p0'], -1500.4999999999998), Search(['p0'], -1499.9999999999998), Search(['p0'], -2.9999700000000002), Search(['p0'], -0.003), Search(['p0'], -71.4107169971501), Search(['p0'], -3.0029999999999997), Search(['p0'], -251.60762597496253), Search(['p0'], -936.0580133450828), Search(['p0'], -1497.0)], ) Unreliable test timings! On an initial run, this test took 396.61ms, which exceeded the deadline of 300.00ms, but on a subsequent run it took 6.36 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('6.88.1', b'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') as a decorator on your test case