diff --git a/tests/system-test/2-query/To_iso8601.py b/tests/system-test/2-query/To_iso8601.py
index 46d368aac4..4051f46866 100644
--- a/tests/system-test/2-query/To_iso8601.py
+++ b/tests/system-test/2-query/To_iso8601.py
@@ -46,9 +46,9 @@ class TDTestCase:
         for i in error_param_list:
             tdSql.error(f'select to_iso8601(ts,"{i}") from ntb')
         # bug TD-16372:对于错误的时区，缺少校验
-        # error_timezone_param = ['+13','-13','+1300','-1300','+0001','-0001','-0330','+0330']
-        # for i in error_timezone_param:
-        #     tdSql.error(f'select to_iso8601(ts,"{i}") from ntb')
+        error_timezone_param = ['+13','-13','+1300','-1300','+0001','-0001','-0330','+0330']
+        for i in error_timezone_param:
+            tdSql.error(f'select to_iso8601(ts,"{i}") from ntb')
         
     def check_base_function(self):
         tdSql.prepare()