diff --git a/gaphor/ui/tests/test_diagrampage.py b/gaphor/ui/tests/test_diagrampage.py
index 688c6ccc91..d1a866d3e6 100644
--- a/gaphor/ui/tests/test_diagrampage.py
+++ b/gaphor/ui/tests/test_diagrampage.py
@@ -38,4 +38,4 @@ def test_placement_icon_base_is_loaded_once():
     icon1 = placement_icon_base()
     icon2 = placement_icon_base()
 
-    assert icon1 is icon2
\ No newline at end of file
+    assert icon1 is icon2