diff --git a/src/caosadvancedtools/models/data_model.py b/src/caosadvancedtools/models/data_model.py
index 266414893bcdf1ab45ee1345fc549e15f4a66250..bd3888b812549fe37f78f31d699e31ad88485291 100644
--- a/src/caosadvancedtools/models/data_model.py
+++ b/src/caosadvancedtools/models/data_model.py
@@ -145,8 +145,8 @@ class DataModel(dict):
                 else:
                     query = db.Query(f"FIND ENTITY with id={ent.id}")
                     ref = query.execute(unique=True)
-                diff = (describe_diff(*compare_entities(ent, ref
-                                                        ), name=ent.name))
+                diff = (describe_diff(*compare_entities(ent, ref),
+                                      name=ent.name))
 
                 if diff != "":
                     if verbose:
diff --git a/unittests/test_yaml_model_parser.py b/unittests/test_yaml_model_parser.py
index d6dbf718dfa539e97214c2329cccc5a6bbf172b6..c578cc333cd9122e9f9399507a5e98aaed8440e7 100644
--- a/unittests/test_yaml_model_parser.py
+++ b/unittests/test_yaml_model_parser.py
@@ -22,6 +22,7 @@ from tempfile import NamedTemporaryFile
 from pytest import raises, mark
 
 import linkahead as db
+
 from caosadvancedtools.models.parser import (TwiceDefinedException,
                                              YamlDefinitionError,
                                              parse_model_from_string,
@@ -641,3 +642,21 @@ RT2:
 </RecordType>
 , 'bar': <RecordType name="bar"/>
 }"""
+
+
+def test_setting_values():
+    model = parse_model_from_string("""
+  parameter:
+    datatype: INTEGER
+
+  Simulation:
+    role: Record
+    obligatory_properties:
+      parameter: 26
+  """)
+
+    assert len(model) == 2
+    assert str(model["parameter"])[:-1] == '<Property name="parameter" datatype="INTEGER"/>'
+    assert model["Simulation"].role == "Record"
+    assert model["Simulation"].name == "Simulation"
+    assert model["Simulation"].get_property("parameter").value == 26