diff --git a/swh/auth/keycloak.py b/swh/auth/keycloak.py
--- a/swh/auth/keycloak.py
+++ b/swh/auth/keycloak.py
@@ -7,6 +7,7 @@
 from urllib.parse import urlencode
 
 from keycloak import KeycloakOpenID
+from keycloak.exceptions import KeycloakError  # noqa
 
 from swh.core.config import load_from_envvar