self = <swh.storage.tests.test_cassandra.TestCassandraStorageGeneratedData object at 0x7f8317ca3240> swh_storage = <swh.storage.validate.ValidatingProxyStorage object at 0x7f830446ff60> @settings(suppress_health_check=[HealthCheck.too_slow]) > @given(strategies.lists(objects(), max_size=2)) def test_add_arbitrary(self, swh_storage, objects): .tox/py3/lib/python3.7/site-packages/swh/storage/tests/test_storage.py:3710: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .tox/py3/lib/python3.7/site-packages/swh/storage/tests/test_storage.py:3732: in test_add_arbitrary method([obj]) .tox/py3/lib/python3.7/site-packages/swh/storage/validate.py:142: in origin_add return self.storage.origin_add([dict_converter(Origin, o) for o in origins]) .tox/py3/lib/python3.7/site-packages/swh/storage/cassandra/storage.py:770: in origin_add for d in [self.origin_get([origin.to_dict() for origin in origins])] .tox/py3/lib/python3.7/site-packages/swh/storage/cassandra/storage.py:771: in <listcomp> if d is not None _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ cls = <class 'swh.model.model.Origin'>, d = [None] @classmethod def from_dict(cls, d): """Takes a dictionary representing a tree of SWH objects, and recursively builds the corresponding objects.""" > return cls(**d) E TypeError: type object argument after ** must be a mapping, not list .tox/py3/lib/python3.7/site-packages/swh/model/model.py:73: TypeError