diff --git a/tests/system-test/2-query/TD-12228.py b/tests/system-test/2-query/TD-12228.py
index 476e67c2da4d69a8124a29b548d663e9c8fed9ff..6108053a804cc61cf808c7741700fbc071e07566 100644
--- a/tests/system-test/2-query/TD-12228.py
+++ b/tests/system-test/2-query/TD-12228.py
@@ -33,6 +33,7 @@ class TDTestCase:
         '''
         case1 <wenzhouwww>: [TD-12228] : 
         this test case is an test case for cache error , it will coredump taoshell .
+	
         ''' 
         return