diff --git a/tests/integration/test_upgrade.py b/tests/integration/test_upgrade.py
index 72cb8481..07f502d2 100644
--- a/tests/integration/test_upgrade.py
+++ b/tests/integration/test_upgrade.py
@@ -15,6 +15,7 @@
 from pytest_operator.plugin import OpsTest
 
 import snap
+
 from .helpers import (
     APPLICATION_DEFAULT_APP_NAME,
     MYSQL_DEFAULT_APP_NAME,