diff --git a/tests/integration/tester-charm/src/charm.py b/tests/integration/tester-charm/src/charm.py
index 228d95b..e7c698d 100755
--- a/tests/integration/tester-charm/src/charm.py
+++ b/tests/integration/tester-charm/src/charm.py
@@ -36,7 +36,6 @@ def __init__(self, *args):
         self.framework.observe(self.on.config_changed, self._on_config_changed)
         self.framework.observe(self.on.upgrade_charm, self._on_upgrade_charm)
 
-
     def _on_upgrade_charm(self, _):
         self._update_cert()