monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7fab5afde860> def test_tags_from_environment_warning(monkeypatch): monkeypatch.setenv("STATSD_TAGS", "valid:tag,invalid_tag") with pytest.warns(UserWarning) as record: statsd = Statsd() assert len(record) == 1 > assert "invalid_tag" in record[0].message.args[0] E assert 'invalid_tag' in "STATSD_TAGS needs to be in 'key:value' format, not {tag!r}" .tox/.tox/py3-core-db-server-github-slow-cover/lib/python3.7/site-packages/swh/core/tests/test_statsd.py:462: AssertionError