self = <swh.storage.tests.test_postgresql.TestPgStorage object at 0x7f543903acc0> swh_storage = <swh.storage.postgresql.storage.Storage object at 0x7f5439044d68> def test_clear_buffers(self, swh_storage): """Calling clear buffers on real storage does nothing """ > assert swh_storage.clear_buffers() is None E TypeError: clear_buffers() missing 1 required positional argument: 'object_types' .tox/py3/lib/python3.7/site-packages/swh/storage/tests/test_postgresql.py:251: TypeError