FIX: add mock

unittests/test_crawler.py

@@ -651,6 +651,8 @@ def test_validation_error_print(caplog):
         caplog.clear()
 
 
+@patch("caoscrawler.identifiable_adapters.get_children_of_rt",
+       new=Mock(side_effect=lambda x: [x]))
 def test_split_into_inserts_and_updates_backref(crawler_mocked_for_backref_test):
     crawler = crawler_mocked_for_backref_test
     identlist = [Identifiable(name="A", record_type="BR"),