self = <swh.storage.tests.test_in_memory.TestInMemoryStorage object at 0x7f453460fac8> swh_storage = <swh.storage.in_memory.InMemoryStorage object at 0x7f453460fb00> sample_data = <swh.storage.tests.storage_data.StorageData object at 0x7f4538fb8f28> def test_snapshot_missing(self, swh_storage, sample_data): snapshot, missing_snapshot = sample_data.snapshots[:2] snapshots = [snapshot.id, missing_snapshot.id] > swh_storage.snapshot_add([snapshot]) .tox/py3/lib/python3.7/site-packages/swh/storage/tests/storage_tests.py:3453: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <swh.storage.in_memory.InMemoryStorage object at 0x7f453460fb00> snapshots = [Snapshot(branches=ImmutableDict({b'master': SnapshotBranch(target=b'\x01\xa7\x11O6\xfd\xdd^\xf2Q\x1b,\xad\xda#zh\xad\...12', target_type=<TargetType.REVISION: 'revision'>)}), id=b'\x9b\x92.m\x8d[\x80<\x15\x82\xaa\xbeU%\xb7\xb9\x11Px\x8e')] def snapshot_add(self, snapshots: List[Snapshot]) -> 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:668: AttributeError