diff --git a/tests/system-test/2-query/9-others/TD-12388.py b/tests/system-test/2-query/9-others/TD-12388.py
deleted file mode 100644
index 62092f086fc4af190068b78bf9f087e1bcc20480..0000000000000000000000000000000000000000
--- a/tests/system-test/2-query/9-others/TD-12388.py
+++ /dev/null
@@ -1,63 +0,0 @@
-###################################################################
-#           Copyright (c) 2020 by TAOS Technologies, Inc.
-#                     All rights reserved.
-#
-#  This file is proprietary and confidential to TAOS Technologies.
-#  No part of this file may be reproduced, stored, transmitted,
-#  disclosed or used in any form or by any means other than as
-#  expressly provided by the written permission from Jianhui Tao
-#
-###################################################################
-
-# -*- coding: utf-8 -*-
-
-from posixpath import split
-import sys
-import os 
-
-from util.log import *
-from util.cases import *
-from util.sql import *
-from util.dnodes import *
-
-class TDTestCase:
-    def init(self, conn, logSql):
-        tdLog.debug("start to execute %s" % __file__)
-        tdSql.init(conn.cursor(), logSql)
-        
-        self.ts = 1420041600000 # 2015-01-01 00:00:00  this is begin time for first record
-        self.num = 10
-
-    def caseDescription(self):
-
-        '''
-        case1 <authors>: wenzhouwww[TD-12388] : 
-            this test case is an test case for unit time params about elapsed function. 
-
-        ''' 
-        return 
-
-   
-    def run(self):
-        tdSql.prepare()
-        tdSql.execute("create database if not exists testdb keep 36500;")
-        tdSql.execute("use testdb;")
-        tdSql.execute("create stable st (ts timestamp , id int , value double) tags(hostname binary(10) ,ind int);")
-        for i in range(self.num):
-            tdSql.execute("insert into sub_%s using st tags('host_%s' , %d) values (%d , %d , %f );"%(str(i),str(i),i*10,self.ts+10000*i,i*2,i+10.00))
-
-        tdSql.error("select elapsed(ts,now+1d-3m) from st group by tbname;")
-        tdSql.error("select elapsed(ts,now) from st group by tbname;")
-        tdSql.error("select elapsed(ts,now*10) from st group by tbname;")
-        tdSql.error("select elapsed(ts,now*2s) from st group by tbname;")
-        tdSql.error("select elapsed(ts,now*2s) from sub_1;")
-       
-
-    def stop(self):
-        tdSql.close()
-        tdLog.success("%s successfully executed" % __file__)
-
-tdCases.addWindows(__file__, TDTestCase())
-tdCases.addLinux(__file__, TDTestCase())
-
-