diff --git a/tests/web_ui_local/test_local_page.py b/tests/web_ui_local/test_local_page.py
index 4970607..39dd7eb 100644
--- a/tests/web_ui_local/test_local_page.py
+++ b/tests/web_ui_local/test_local_page.py
@@ -22,7 +22,7 @@ def setup_method(self, method):
         )
 
     def teardown_method(self, method):
-        self._app.at(setup.CloseApp, screenshot_filename=f"./guara-1.png")
+        self._app.at(setup.CloseApp, screenshot_filename="./guara-1.png")
 
     def test_vpm_transaction_chain(self):
         text = ["cheese", "selenium", "test", "bla", "foo"]