diff --git a/unittests/test_identifiable_adapters.py b/unittests/test_identifiable_adapters.py
index 8fbbf07e467a46a48cb3a1e6d648c7ec74c7d2b3..5108e83c83db16f1b44d836bf22d21d8e871ee8f 100644
--- a/unittests/test_identifiable_adapters.py
+++ b/unittests/test_identifiable_adapters.py
@@ -44,7 +44,6 @@ from caoscrawler.sync_graph import SyncNode
 UNITTESTDIR = Path(__file__).parent
 
 
-
 def mock_retrieve_RecordType(id, name):
     return {
         "Person": db.RecordType(name="Person"),
@@ -58,6 +57,7 @@ def mock_retrieve_RecordType(id, name):
         "Measurement": db.RecordType(name="Measurement").add_parent("Experiment")
     }[name]
 
+
 def test_create_query_for_identifiable():
     query = IdentifiableAdapter.create_query_for_identifiable(
         Identifiable(record_type="Person", properties={"first_name": "A", "last_name": "B"}))
@@ -113,7 +113,8 @@ def test_create_query_for_identifiable():
         Identifiable(record_type="record type", name="it's weird"))
     assert query == ("FIND RECORD 'record type' WITH name='it\\'s weird'")
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
        new=Mock(side_effect=mock_retrieve_RecordType))
 def test_load_from_yaml_file():
     ident = CaosDBIdentifiableAdapter()
@@ -189,7 +190,8 @@ def test_convert_value():
 
     assert convert_value(A()) == " a "
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
        new=Mock(side_effect=mock_retrieve_RecordType))
 def test_get_identifiable():
     ident = CaosDBIdentifiableAdapter()
@@ -300,7 +302,8 @@ def test_referencing_entity_has_appropriate_type():
     registered_identifiable.properties[0].value = ["B", "*"]
     assert rft(dummy.parents, registered_identifiable)
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
        new=Mock(side_effect=mock_retrieve_RecordType))
 def test_get_registered_identifiable():
     # Test the case that the record has a parent for which an identifiable is registered
@@ -317,7 +320,6 @@ def test_get_registered_identifiable():
     assert registered is not None
     assert registered.parents[0].name == "Experiment"
 
-
     # Test the same but with an additional parent that also has a registered identifiable
     rec = db.Record().add_parent(name="Analysis").add_parent(name="Experiment")
     with pytest.raises(RuntimeError):
@@ -335,4 +337,4 @@ def test_get_registered_identifiable():
     rec = db.Record().add_parent(name="Measurement")
     registered = ident.get_registered_identifiable(rec)
     assert registered is not None
-    assert registered.parents[0].name == "Experiment"
\ No newline at end of file
+    assert registered.parents[0].name == "Experiment"
diff --git a/unittests/test_sync_graph.py b/unittests/test_sync_graph.py
index 85979a582763da0f1dbb71d29457c34082ad817d..030306b95578865cdbfe19bdef2998a573848bd5 100644
--- a/unittests/test_sync_graph.py
+++ b/unittests/test_sync_graph.py
@@ -139,8 +139,9 @@ def test_create_reference_mapping():
     assert forward_references_backref[id(b)] == set([a])
     assert backward_references_backref[id(b)] == set()
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 @patch("caoscrawler.sync_graph.cached_get_entity_by",
        new=Mock(side_effect=mock_get_entity_by))
 def test_SyncGraph_init():
@@ -204,8 +205,9 @@ def test_SyncGraph_init():
         if not st._identity_relies_on_unchecked_entity(el):
             assert el.identifiable is not None or el.id is not None
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 @patch("caoscrawler.identifiable_adapters.get_children_of_rt",
        new=Mock(side_effect=lambda x: [x]))
 def test_merge_into_trivial(simple_adapter):
@@ -283,8 +285,9 @@ def test_merge_into_trivial(simple_adapter):
     assert len(st.backward_references_backref[id(se_c)]) == 1
     assert se_b in st.backward_references_backref[id(se_c)]
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 @patch("caoscrawler.identifiable_adapters.get_children_of_rt",
        new=Mock(side_effect=lambda x: [x]))
 def test_merge_into_simple(simple_adapter):
@@ -365,8 +368,9 @@ def test_merge_into_simple(simple_adapter):
     assert len(st.backward_references_backref[id(se_c)]) == 1
     se_b in st.backward_references_backref[id(se_c)]
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 @patch("caoscrawler.identifiable_adapters.get_children_of_rt",
        new=Mock(side_effect=lambda x: [x]))
 def test_backward_references_backref():
@@ -384,8 +388,9 @@ def test_backward_references_backref():
     st = SyncGraph(ent_list, ident_adapter)
     assert st.nodes[1] in st.backward_references_backref[id(st.nodes[0])]
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 @patch("caoscrawler.identifiable_adapters.get_children_of_rt",
        new=Mock(side_effect=lambda x: [x]))
 def test_set_id_of_node(simple_adapter):
@@ -488,8 +493,9 @@ def test_set_id_of_node(simple_adapter):
     assert st.nodes[0].identifiable is not None
     assert len(st.nodes) == 2
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 @patch("caoscrawler.sync_graph.cached_get_entity_by",
        new=Mock(side_effect=mock_get_entity_by))
 def test_merging(simple_adapter):
@@ -574,8 +580,9 @@ def test_merging(simple_adapter):
     assert len(st.nodes) == 4
     assert len(st.unchecked) == 0
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 def test_update_of_reference_values(simple_adapter):
     # multiple nodes are merged including one that is referenced
     # assure that this still leads to the value of the property of the referencing node to be
@@ -598,8 +605,9 @@ def test_update_of_reference_values(simple_adapter):
     b_prop = st.nodes[1].properties[0].value
     assert b_prop.id == 101
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 def test_ignoring_irrelevant_references(simple_adapter):
     # make sure that a circle of references is no problem if one references is not identifying
     b = db.Record(name='b').add_parent("RT5")
@@ -660,8 +668,9 @@ def test_set_each_scalar_value():
     _set_each_scalar_value(a, lambda x: x == 42, lambda x: None)
     assert a.properties[0].value is None
 
-@patch("caoscrawler.identifiable_adapters._retrieve_RecordType", 
-       new=Mock(side_effect=lambda id, name: db.RecordType(id=id,name=name)))
+
+@patch("caoscrawler.identifiable_adapters._retrieve_RecordType",
+       new=Mock(side_effect=lambda id, name: db.RecordType(id=id, name=name)))
 @patch("caoscrawler.identifiable_adapters.cached_query",
        new=Mock(side_effect=mock_cached_only_rt_allow_empty))
 def test_merge_referenced_by():