diff --git a/src/yunohost/app.py b/src/yunohost/app.py
index 1e6ac3a82..1024b8b28 100644
--- a/src/yunohost/app.py
+++ b/src/yunohost/app.py
@@ -658,6 +658,7 @@ def app_upgrade(auth, app=[], url=None, file=None):
     if is_api:
         return {"log": service_log('yunohost-api', number="100").values()[0]}
 
+
 def app_install(auth, app, label=None, args=None, no_remove_on_failure=False, **kwargs):
     """
     Install apps
diff --git a/src/yunohost/hook.py b/src/yunohost/hook.py
index 89defe55e..1f971edb6 100644
--- a/src/yunohost/hook.py
+++ b/src/yunohost/hook.py
@@ -364,7 +364,6 @@ def hook_exec(path, args=None, raise_on_error=False, no_trace=False,
         lambda l: logger.info(l.rstrip()),
         lambda l: logger.warning(l.rstrip()),
     )
-
     returncode = call_async_output(
         command, callbacks, shell=False, cwd=chdir
     )