diff --git a/tests/system-test/0-others/user_control.py b/tests/system-test/0-others/user_control.py
index 18246774e4794ad891e4f96d2a3b42e33d0ff770..c4660258473b14e5addc0a4a793003525ef4d309 100644
--- a/tests/system-test/0-others/user_control.py
+++ b/tests/system-test/0-others/user_control.py
@@ -162,6 +162,8 @@ class TDTestCase:
         for sql in sqls:
             tdSql.error(sql)
 
+        tdSql.execute("DROP USER u1")
+
     def __alter_pass_sql(self, user, passwd):
         return f'''ALTER USER {user} PASS '{passwd}' '''