self = <swh.storage.tests.test_postgresql.TestPgStorage object at 0x7f54d82869b0> swh_storage = <swh.storage.postgresql.storage.Storage object at 0x7f54d8286e80> def test_flush(self, swh_storage): """Calling clear buffers on real storage does nothing """ > assert swh_storage.flush() == {} E TypeError: flush() missing 1 required positional argument: 'object_types' .tox/py3/lib/python3.7/site-packages/swh/storage/tests/test_postgresql.py:257: TypeError