self = <swh.storage.tests.test_in_memory.TestInMemoryStorage object at 0x7fb632b27588> swh_storage = <swh.storage.in_memory.InMemoryStorage object at 0x7fb616f73e80> sample_data = <swh.storage.tests.storage_data.StorageData object at 0x7fb60c8b69e8> def test_snapshot_add_get_empty(self, swh_storage, sample_data): empty_snapshot = sample_data.snapshots[1] empty_snapshot_dict = empty_snapshot.to_dict() origin = sample_data.origin > swh_storage.origin_add([origin]) .tox/py3/lib/python3.7/site-packages/swh/storage/tests/storage_tests.py:2847: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <swh.storage.in_memory.InMemoryStorage object at 0x7fb616f73e80> origins = [Origin(url='https://github.com/user1/repo1')] def origin_add(self, origins: List[Origin]) -> Dict[str, int]: > if self._check_missing: E AttributeError: 'InMemoryStorage' object has no attribute '_check_missing' .tox/py3/lib/python3.7/site-packages/swh/storage/cassandra/storage.py:937: AttributeError