diff --git a/cinder/tests/unit/test_synology_common.py b/cinder/tests/unit/test_synology_common.py
index 4bbb6e7285c..9dce909f73f 100644
--- a/cinder/tests/unit/test_synology_common.py
+++ b/cinder/tests/unit/test_synology_common.py
@@ -1426,7 +1426,7 @@ class SynoCommonTestCase(test.TestCase):
                                'delete_snapshot',
                                mock.ANY,
                                snapshot_uuid=DS_SNAPSHOT_UUID,
-                               delete_by='Cinder'))
+                               deleted_by='Cinder'))
         self.assertIsNone(result)
 
         result = self.common.delete_snapshot(SNAPSHOT)
diff --git a/cinder/volume/drivers/synology/synology_common.py b/cinder/volume/drivers/synology/synology_common.py
index 7f6475ced84..23f01ee4b4a 100644
--- a/cinder/volume/drivers/synology/synology_common.py
+++ b/cinder/volume/drivers/synology/synology_common.py
@@ -1116,7 +1116,7 @@ class SynoCommon(object):
                                    'delete_snapshot',
                                    1,
                                    snapshot_uuid=ds_snapshot_uuid,
-                                   delete_by='Cinder')
+                                   deleted_by='Cinder')
 
             self.check_response(out, snapshot_id=snapshot['id'])