diff --git a/unittests/test_crawler.py b/unittests/test_crawler.py
index e13bf5ea31602eed0f52e8498a4c30e1291af727..d48333aae40cddf30c29c732e83b3816eb7236ff 100644
--- a/unittests/test_crawler.py
+++ b/unittests/test_crawler.py
@@ -686,7 +686,7 @@ def test_split_into_inserts_and_updates_backref(crawler_mocked_for_backref_test)
 
 
 @patch("caoscrawler.identifiable_adapters.get_children_of_rt",
-       new=Mock(side_effect=id()))
+       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
@@ -708,7 +708,7 @@ def test_split_into_inserts_and_updates_mult_backref(crawler_mocked_for_backref_
 
 
 @patch("caoscrawler.identifiable_adapters.get_children_of_rt",
-       new=Mock(side_effect=id()))
+       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
diff --git a/unittests/test_file_identifiables.py b/unittests/test_file_identifiables.py
index 2852b40ffde98180d5dd7b11b9109cc5875502da..20680d97b3af8d79825c0a4e9020db6ee7fa7b8d 100644
--- a/unittests/test_file_identifiables.py
+++ b/unittests/test_file_identifiables.py
@@ -19,7 +19,8 @@ from test_crawler import mock_get_entity_by
 def clear_cache():
     cache_clear()
 
-
+@patch("caoscrawler.identifiable_adapters.get_children_of_rt",
+       new=Mock(side_effect=id))
 @patch("caoscrawler.identifiable_adapters.cached_get_entity_by",
        new=Mock(side_effect=mock_get_entity_by))
 def test_file_identifiable():