diff --git a/tests/system-test/0-others/user_control.py b/tests/system-test/0-others/user_control.py
index 87f689b3a364349fad98b5ae76d96821b2a6610a..609863e1138ca0c2fc12e5b06dc7c2b7f4523818 100644
--- a/tests/system-test/0-others/user_control.py
+++ b/tests/system-test/0-others/user_control.py
@@ -205,53 +205,37 @@ class TDTestCase:
     def __grant_user_privileges(self, privilege,  dbname=None, user_name="root"):
         return f"GRANT {privilege} ON {self.__priv_level(dbname)} TO {user_name} "
 
-    def grant_check_read(self, user="root", passwd="taosdata"):
-        # sourcery skip: class-extract-method
+    def grant_check(self, user="root", passwd="taosdata", priv=PRIVILEGES_ALL):
         with taos_connect(user=user, passwd=passwd) as user:
             user.query("use db")
             user.query("show tables")
-            user.query("select * from ct1")
-            user.error("insert into t1 (ts) values (now())")
-
-    def grant_check_write(self, user="root", passwd="taosdata"):
-        with taos_connect(user=user, passwd=passwd) as user:
-            user.query("use db")
-            user.query("show tables")
-            user.error("select * from ct1")
-            user.query("insert into t1 (ts) values (now())")
-
-    def grant_check_all(self, user="root", passwd="taosdata"):
-        with taos_connect(user=user, passwd=passwd) as user:
-            user.query("use db")
-            user.query("show tables")
-            user.query("select * from ct1")
-            user.query("insert into t1 (ts) values (now())")
-
-    def grant_check_none(self, user="root", passwd="taosdata"):
-        with taos_connect(user=user, passwd=passwd) as user:
-            user.query("use db")
-            user.query("show tables")
-            user.error("select * from ct1")
-            user.error("insert into t1 (ts) values (now())")
+            if priv in [PRIVILEGES_ALL, PRIVILEGES_READ]:
+                user.query("select * from ct1")
+            else:
+                user.error("select * from ct1")
+            if priv in [PRIVILEGES_ALL, PRIVILEGES_WRITE]:
+                user.query("insert into t1 (ts) values (now())")
+            else:
+                user.error("insert into t1 (ts) values (now())")
 
     def test_grant_current(self):
         tdLog.printNoPrefix("==========step 1.0: if do not grant, can not read/write")
-        self.grant_check_none(user=self.__user_list[0], passwd=self.__passwd_list[0])
+        self.grant_check(user=self.__user_list[0], passwd=self.__passwd_list[0], priv=None)
 
         tdLog.printNoPrefix("==========step 1.1: grant read, can read, can not write")
-        sql = self.__grant_user_privileges(privilege=self.__privilege[1], user_name=self.__user_list[0])
+        sql = self.__grant_user_privileges(privilege=PRIVILEGES_READ, user_name=self.__user_list[0])
         tdLog.info(sql)
         tdSql.query(sql)
-        self.grant_check_read(user=self.__user_list[0], passwd=self.__passwd_list[0])
+        self.grant_check(user=self.__user_list[0], passwd=self.__passwd_list[0], priv=PRIVILEGES_READ)
 
         tdLog.printNoPrefix("==========step 1.2: grant write, can write, can not read")
-        sql = self.__grant_user_privileges(privilege=self.__privilege[2], user_name=self.__user_list[1])
+        sql = self.__grant_user_privileges(privilege=PRIVILEGES_WRITE, user_name=self.__user_list[1])
         tdLog.info(sql)
         tdSql.query(sql)
-        self.grant_check_write(user=self.__user_list[1], passwd=self.__passwd_list[1])
+        self.grant_check(user=self.__user_list[1], passwd=self.__passwd_list[1], priv=PRIVILEGES_WRITE)
 
         tdLog.printNoPrefix("==========step 1.3: grant all, can write and read")
-        sql = self.__grant_user_privileges(privilege=self.__privilege[0], user_name=self.__user_list[2])
+        sql = self.__grant_user_privileges(privilege=PRIVILEGES_ALL, user_name=self.__user_list[2])
         tdLog.info(sql)
         tdSql.query(sql)
         self.grant_check_all(user=self.__user_list[2], passwd=self.__passwd_list[2])