✨ fixes tests

Author: nazrulworld

tests/test_fhirabstractmodel.py

@@ -79,7 +79,7 @@ def get_required_fields(self) -> typing.List[typing.Tuple[str, str]]:
     with pytest.raises(ValidationError) as exception_info:
         MyPrimitivesValueFieldsModel(postCode=1230, active=True, meta={"id": "001"})
 
-    assert "None value is not allowed" in str(exception_info.value)
+    assert "Value for the field 'name' is required" in str(exception_info.value)
 
     # test with extension
     obj = MyPrimitivesValueFieldsModel(