@pytest.fixture(scope="function") def content_application_no_highlight(): """Fixture returning a random textual content with mimetype starting with application/ and no detected programming language to highlight ingested into the test archive. """ > return random.choice(_content_application_no_highlight()) .tox/py3/lib/python3.7/site-packages/swh/web/tests/conftest.py:358: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <random.Random object at 0x2461798>, seq = [] def choice(self, seq): """Choose a random element from a non-empty sequence.""" try: i = self._randbelow(len(seq)) except ValueError: > raise IndexError('Cannot choose from an empty sequence') from None E IndexError: Cannot choose from an empty sequence /usr/lib/python3.7/random.py:261: IndexError