def test_random_fixtures(): """Check random fixture values will be different when random seed is not explicitly provided. """ result_first = subprocess.run( [*pytest_command, "random_fixtures_test.py"], capture_output=True, cwd=os.path.dirname(__file__), ) result_second = subprocess.run( [*pytest_command, "random_fixtures_test.py"], capture_output=True, cwd=os.path.dirname(__file__), ) > assert result_first.stderr != result_second.stderr E AssertionError: assert b'' != b'' E + where b'' = CompletedProcess(args=['python3', '-m', 'pytest', '-s', 'random_fixtures_test.py'], returncode=1, stdout=b'===========... IndexError: Canno...\n======================== 13 warnings, 1 error in 3.16s =========================\n', stderr=b'').stderr E + and b'' = CompletedProcess(args=['python3', '-m', 'pytest', '-s', 'random_fixtures_test.py'], returncode=1, stdout=b'===========... IndexError: Canno...\n======================== 13 warnings, 1 error in 3.15s =========================\n', stderr=b'').stderr .tox/py3/lib/python3.7/site-packages/swh/web/tests/test_random_fixtures.py:26: AssertionError