self = <swh.storage.tests.test_in_memory.TestInMemoryStorage object at 0x7f3853de17b8> swh_storage = <swh.storage.in_memory.InMemoryStorage object at 0x7f3870a9b198> sample_data = <swh.storage.tests.storage_data.StorageData object at 0x7f3854eb9f98> def test_release_add(self, swh_storage, sample_data): release, release2 = sample_data.releases[:2] init_missing = swh_storage.release_missing([release.id, release2.id]) assert list(init_missing) == [release.id, release2.id] > actual_result = swh_storage.release_add([release, release2]) .tox/py3/lib/python3.7/site-packages/swh/storage/tests/storage_tests.py:1272: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <swh.storage.in_memory.InMemoryStorage object at 0x7f3870a9b198> releases = [Release(name=b'v0.0.1', message=b'synthetic release', target=b'\x01\xa7\x11O6\xfd\xdd^\xf2Q\x1b,\xad\xda#zh\xad\xbb\x...=-120, negative_utc=False), metadata=None, id=b'\xdb\x81\xa2g\x83\xa3\xf4\xa9\xdb\x07\xb4u\x9f\xfc7b\x1f\x15\x9b\xb2')] def release_add(self, releases: List[Release]) -> Dict: > if not self._allow_overwrite: E AttributeError: 'InMemoryStorage' object has no attribute '_allow_overwrite' .tox/py3/lib/python3.7/site-packages/swh/storage/cassandra/storage.py:638: AttributeError