self = <swh.storage.tests.test_in_memory.TestInMemoryStorage object at 0x7fb7fa45a668> swh_storage = <swh.storage.in_memory.InMemoryStorage object at 0x7fb7fa45a7b8> sample_data = <swh.storage.tests.storage_data.StorageData object at 0x7fb634db5390> def test_snapshot_add_get_filtered_and_paginated(self, swh_storage, sample_data): complete_snapshot = sample_data.snapshots[2] > swh_storage.snapshot_add([complete_snapshot]) .tox/py3/lib/python3.7/site-packages/swh/storage/tests/storage_tests.py:3178: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = <swh.storage.in_memory.InMemoryStorage object at 0x7fb7fa45a7b8> snapshots = [Snapshot(branches=ImmutableDict({b'directory': SnapshotBranch(target=b'RV\xe8V\xa0\xa0\x89\x89f\xd6\xba\x14\xfe\xb48\...etType.SNAPSHOT: 'snapshot'>), b'dangling': None}), id=b'\xa5l\xe2\xd8\x1c\x19\x00#\xbb\x99\xa3\xa3by0u"\xcb\x85\xf6')] def snapshot_add(self, snapshots: List[Snapshot]) -> Dict: > 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:665: AttributeError