diff --git a/tests/test_resources.py b/tests/test_resources.py
index 3b83028300..62fe0aaeed 100644
--- a/tests/test_resources.py
+++ b/tests/test_resources.py
@@ -48,7 +48,6 @@ def test_external(self):
         )
         app.layout = dcc.Markdown()
         app.scripts.config.serve_locally = False
-        app.scripts.config.xxx = 123
 
         with mock.patch('dash.dash.os.stat', return_value=StatMock()):
             resource = app._collect_and_register_resources(