diff --git a/src/caoscrawler/identifiable_adapters.py b/src/caoscrawler/identifiable_adapters.py
index 2211ce89e495245388e7f8bbb44237109f160357..d3716bb6d0d5e35a968dc446eec305add60846db 100644
--- a/src/caoscrawler/identifiable_adapters.py
+++ b/src/caoscrawler/identifiable_adapters.py
@@ -40,6 +40,12 @@ from .utils import has_parent
 logger = logging.getLogger(__name__)
 
 
+def get_children_of_rt(rtname):
+    """Supply the name of a recordtype. This name and the name of all children RTs are returned in
+    a list"""
+    return [p.name for p in db.execute_query(f"FIND RECORDTYPE {givenrt}")]
+
+
 def convert_value(value: Any):
     """ Returns a string representation of the value that is suitable
     to be used in the query
@@ -213,8 +219,7 @@ identifiabel, identifiable and identified record) for a Record.
                 # separate class too
                 if prop.name.lower() == "is_referenced_by":
                     for givenrt in prop.value:
-                        rt_and_children = [p.name
-                                           for p in db.execute_query(f"FIND RECORDTYPE {givenrt}")]
+                        rt_and_children = get_children_of_rt(givenrt)
                         found = False
                         for rtname in rt_and_children:
                             if (id(record) in referencing_entities
diff --git a/unittests/test_crawler.py b/unittests/test_crawler.py
index dc53cb099eb5e4b225b13461176504a003f2d2ba..e13bf5ea31602eed0f52e8498a4c30e1291af727 100644
--- a/unittests/test_crawler.py
+++ b/unittests/test_crawler.py
@@ -607,7 +607,7 @@ def test_create_flat_list():
     assert c in flat
 
 
-@ pytest.fixture
+@pytest.fixture
 def crawler_mocked_for_backref_test():
     crawler = Crawler()
     # mock retrieval of registered identifiabls: return Record with just a parent
@@ -685,6 +685,8 @@ def test_split_into_inserts_and_updates_backref(crawler_mocked_for_backref_test)
     assert insert[0].name == "B"
 
 
+@patch("caoscrawler.identifiable_adapters.get_children_of_rt",
+       new=Mock(side_effect=id()))
 def test_split_into_inserts_and_updates_mult_backref(crawler_mocked_for_backref_test):
     # test whether multiple references of the same record type are correctly used
     crawler = crawler_mocked_for_backref_test
@@ -705,6 +707,8 @@ def test_split_into_inserts_and_updates_mult_backref(crawler_mocked_for_backref_
     assert len(insert) == 2
 
 
+@patch("caoscrawler.identifiable_adapters.get_children_of_rt",
+       new=Mock(side_effect=id()))
 def test_split_into_inserts_and_updates_diff_backref(crawler_mocked_for_backref_test):
     # test whether multiple references of the different record types are correctly used
     crawler = crawler_mocked_for_backref_test