diff --git a/tests/integration/tests/test_util/harness/lxd.py b/tests/integration/tests/test_util/harness/lxd.py
index f261291c7..2935e6c71 100644
--- a/tests/integration/tests/test_util/harness/lxd.py
+++ b/tests/integration/tests/test_util/harness/lxd.py
@@ -131,7 +131,9 @@ def new_instance(self, network_type: str = "IPv4") -> Instance:
         except subprocess.CalledProcessError as e:
             raise HarnessError(f"Failed to create LXD container {instance_id}") from e
 
-        stubbornly(retries=3, delay_s=5).on(instance_id).exec(["snap", "wait", "system", "seed.loaded"])
+        stubbornly(retries=3, delay_s=5).on(instance_id).exec(
+            ["snap", "wait", "system", "seed.loaded"]
+        )
         return Instance(self, instance_id)
 
     def _configure_profile(self, profile_name: str, profile_config: str):