diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index 6aec67f9ce..e37dc6748a 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -84,4 +84,7 @@ python3 ./test.py $1 -f import_merge/importTRestart.py
 
 # user
 python3 ./test.py $1 -f user/user_create.py
-python3 ./test.py $1 -f user/pass_len.py
\ No newline at end of file
+python3 ./test.py $1 -f user/pass_len.py
+
+# table
+#python3 ./test.py $1 -f table/del_stable.py
\ No newline at end of file
diff --git a/tests/pytest/table/del_stable.py b/tests/pytest/table/del_stable.py
new file mode 100644
index 0000000000..c81d598638
--- /dev/null
+++ b/tests/pytest/table/del_stable.py
@@ -0,0 +1,50 @@
+###################################################################
+#           Copyright (c) 2016 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 -*-
+
+import sys
+import taos
+from util.log import tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+
+
+class TDTestCase:
+    def init(self, conn):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+
+    def run(self):
+        tdSql.prepare()
+
+        tdSql.execute("drop database if exists db")
+        print("==============step1")
+        tdSql.execute("create database db")
+        tdSql.execute("create table db.st (ts timestamp, i int) tags(j int)")
+        tdSql.execute("create table db.tb using st tags(1)")
+        tdSql.execute("insert into db.tb values(now, 1)")
+
+        print("==============step2")
+        try:
+            tdSql.execute("drop table db.st")
+        except Exception as e:
+            tdLog.exit(e)
+        tdSql.execute("select * from db.st")
+        tdSql.checkRows(1)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/script/basicSuite.sim b/tests/script/basicSuite.sim
index a99edfd93d..d0bb58ec20 100644
--- a/tests/script/basicSuite.sim
+++ b/tests/script/basicSuite.sim
@@ -18,3 +18,5 @@ run general/table/vgroup.sim
 run general/user/basic1.sim
 run general/user/pass_alter.sim
 run general/vector/single.sim
+run general/connection/connection.sim
+run general/user/authority.sim
diff --git a/tests/script/general/connection/connection.sim b/tests/script/general/connection/connection.sim
new file mode 100644
index 0000000000..71db20b285
--- /dev/null
+++ b/tests/script/general/connection/connection.sim
@@ -0,0 +1,21 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c wallevel -v 0
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ============= step1
+sql close
+print close1
+sql connect
+
+print ============= step2
+sql close
+sql connect
+
+print ============= step3
+sql close
+sql connect write
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file
diff --git a/tests/script/general/db/delete_reuse2.sim b/tests/script/general/db/delete_reuse2.sim
index d8b2763042..d2fcaad838 100644
--- a/tests/script/general/db/delete_reuse2.sim
+++ b/tests/script/general/db/delete_reuse2.sim
@@ -30,6 +30,7 @@ sleep 2000
 system sh/exec.sh -n dnode1 -s start
 sleep 3000
 sql connect
+sql reset query cache
 
 print ======== step1 
 sql create database d1 replica 1
diff --git a/tests/script/general/user/authority.sim b/tests/script/general/user/authority.sim
new file mode 100644
index 0000000000..06f0467626
--- /dev/null
+++ b/tests/script/general/user/authority.sim
@@ -0,0 +1,72 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/exec.sh -n dnode1 -s start
+sql connect
+sleep 3000
+
+print ============= step1
+sql create user read pass 'taosdata'
+sql create user write pass 'taosdata'
+sql show users
+if $rows != 5 then
+  return -1
+endi
+
+print ============= step2
+sql close
+sql connect read
+sleep 2000
+
+sql create database dread
+sql show databases
+if $rows != 1 then
+  return -1
+endi
+
+print ============= step3
+sql close
+sql connect write
+sleep 2000
+
+sql create database dwrite
+sql show databases
+if $rows != 1 then
+  return -1
+endi
+
+print ============ step4
+sql close
+sql connect
+sleep 2000
+
+sql show databases
+if $row != 2 then
+  return -1
+endi
+
+print ============ step5
+sql close
+sql connect read
+sleep 2000
+
+sql drop database dread
+sql drop database dwrite -x step51
+
+step51:
+
+sql close
+sql connect
+sql show databases
+if $rows != 1 then
+  return -1
+endi
+
+sql close
+sql connect
+sleep 2000
+sql drop database d1
+sql drop database d2
+sql drop database d3
+sql drop database d4
+
+system sh/exec_up.sh -n dnode1 -s stop  -x SIGINT
\ No newline at end of file