diff --git a/tests/controller/test_project.py b/tests/controller/test_project.py
index 24f9314ce..b0202c01f 100644
--- a/tests/controller/test_project.py
+++ b/tests/controller/test_project.py
@@ -82,6 +82,7 @@ async def test_json():
         "drawing_grid_size": 25,
         "supplier": None,
         "variables": None,
+        "marker_definitions": {},
         "created_by": None
     }
 
diff --git a/tests/controller/test_topology.py b/tests/controller/test_topology.py
index 85492596c..bc87c1ee3 100644
--- a/tests/controller/test_topology.py
+++ b/tests/controller/test_topology.py
@@ -60,6 +60,7 @@ async def test_project_to_topology_empty(tmpdir):
             "supplier": None,
             "variables": None,
             "version": __version__,
+            "marker_definitions": {},
             "created_by": None
         }