diff --git a/swh/lister/core/db_utils.py b/swh/lister/core/db_utils.py
index 0563036..bfdabb7 100644
--- a/swh/lister/core/db_utils.py
+++ b/swh/lister/core/db_utils.py
@@ -1,18 +1,18 @@
 # Copyright (C) 2015  Stefano Zacchiroli <zack@upsilon.cc>
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from contextlib import contextmanager
 
 
 @contextmanager
 def session_scope(mk_session):
     session = mk_session()
     try:
         yield session
         session.commit()
-    except:
+    except:  # noqa
         session.rollback()
         raise
     finally:
         session.close()