=================================== FAILURES ===================================
__________________________________ test_basic __________________________________

emmo = get_ontology("http://emmo.info/emmo-inferred#")

    def test_basic(emmo: "Ontology") -> None:
        from ontopy import get_ontology
        from ontopy.utils import LabelDefinitionError
    
        onto = get_ontology("onto.owl")
        onto.imported_ontologies.append(emmo)
        onto.base_iri = "http://emmo.info/examples/test#"
    
        # Add entity directly
        onto.new_entity("Hydrogen", emmo.Atom)
    
    
        print([onto.Hydrogen])
>       print(onto.get_by_label_all("Hydrogen"))

tests/test_basic.py:23: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = get_ontology("http://emmo.info/examples/test#"), label = 'Hydrogen'
label_annotations = None, prefix = None

    def get_by_label_all(self, label, label_annotations=None, prefix=None):
        """Like get_by_label(), but returns a list with all matching labels.
    
        Returns an empty list if no matches could be found.
        """
        if not isinstance(label, str):
            raise TypeError(
                f"Invalid label definition, " f"must be a string: {label!r}"
            )
        if " " in label:
            raise ValueError(
                f"Invalid label definition, {label!r} contains spaces."
            )
    
        if label_annotations is None:
>           annotations = (_.name for _ in self.label_annotations)
E           TypeError: 'NoneType' object is not iterable

../../../.envs/ontopy/lib/python3.10/site-packages/ontopy/ontology.py:371: TypeError
----------------------------- Captured stdout call -----------------------------
[onto.Hydrogen]
=========================== short test summary info ============================
FAILED tests/test_basic.py::test_basic - TypeError: 'NoneType' object is not ...
========================= 1 failed, 1 passed in 1.25s ==========================