diff --git a/tests/test_app.py b/tests/test_app.py
index d729652..e2f6cc5 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -519,7 +519,9 @@ def config_panel(app):
                 "Please do not commit config_panel.toml.example ... This is just a 'documentation' for the config panel syntax meant to be kept in example_ynh"
             )
 
-        if not file_exists(app.path + "/config_panel.toml") and file_exists(app.path + "/scripts/config"):
+        if not file_exists(app.path + "/config_panel.toml") and file_exists(
+            app.path + "/scripts/config"
+        ):
             yield Warning(
                 "The script 'config' exists but there is no config_panel.toml ... Please remove the 'config' script if this is just the example from example_ynh, or add a proper config_panel.toml if the point is really to have a config panel"
             )