self = <swh.storage.tests.test_in_memory.TestInMemoryStorage object at 0x7fb3d52cc898> swh_storage = <swh.storage.in_memory.InMemoryStorage object at 0x7fb3d49ab6a0> sample_data = <swh.storage.tests.storage_data.StorageData object at 0x7fb3d49a8da0> def test_revision_add(self, swh_storage, sample_data): revision = sample_data.revision init_missing = swh_storage.revision_missing([revision.id]) assert list(init_missing) == [revision.id] > actual_result = swh_storage.revision_add([revision]) .tox/py3/lib/python3.7/site-packages/swh/storage/tests/storage_tests.py:927: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .tox/py3/lib/python3.7/site-packages/swh/storage/cassandra/storage.py:484: in revision_add revisions = list(set(revisions)) <attrs generated hash swh.model.model.Revision>:15: in __hash__ self.extra_headers, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ self = ImmutableDict({'checksums': {'sha1': 'tarball-sha1', 'sha256': 'tarball-sha256'}, 'signed-off-by': 'some-dude'}) def __hash__(self): > return hash(tuple(sorted(self.data))) E TypeError: unhashable type: 'dict' .tox/py3/lib/python3.7/site-packages/swh/model/collections.py:49: TypeError