diff --git a/src/blenderbim/test/tool/test_material.py b/src/blenderbim/test/tool/test_material.py
index 4079654600..467eb34afe 100644
--- a/src/blenderbim/test/tool/test_material.py
+++ b/src/blenderbim/test/tool/test_material.py
@@ -43,7 +43,7 @@ class TestAddDefaultMaterialObject(NewFile):
 
 class TestDeleteObject(NewFile):
     def test_run(self):
-        material = subject.add_default_material_object()
+        material = subject.add_default_material_object(None)
         assert bpy.data.materials.get("Default")
         subject.delete_object(material)
         assert not bpy.data.materials.get("Default")