self = <swh.storage.tests.test_in_memory.TestInMemoryStorage object at 0x7f3870abc4e0> swh_storage = <swh.storage.in_memory.InMemoryStorage object at 0x7f38534edd68> sample_data = <swh.storage.tests.storage_data.StorageData object at 0x7f387558e400> def test_release_get_random(self, swh_storage, sample_data): release, release2, release3 = sample_data.releases[:3] > swh_storage.release_add([release, release2, release3]) .tox/py3/lib/python3.7/site-packages/swh/storage/tests/storage_tests.py:1369: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <swh.storage.in_memory.InMemoryStorage object at 0x7f38534edd68> 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...offset=-120, negative_utc=False), metadata=None, id=b'\x1c]B\xe6\x03\xce.\xeaD\x91\x7f\xad\xcav\xc7\x8b\xadv\xae\xb9')] 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