diff --git a/gemviz/tests/test_utils.py b/gemviz/tests/test_utils.py
index b9947aa..0b33c02 100644
--- a/gemviz/tests/test_utils.py
+++ b/gemviz/tests/test_utils.py
@@ -86,6 +86,7 @@ def test_widget1(qtbot):
     """Test a simple Qt widget."""
     widget = QtWidgets.QWidget(None)
     # qtbot.addWidget(widget)
+    assert widget is not None
 
 
 def test_widget2(qtbot):