diff --git a/packaging/cfg/taos.cfg b/packaging/cfg/taos.cfg
index 7be6e72962..c12726d292 100644
--- a/packaging/cfg/taos.cfg
+++ b/packaging/cfg/taos.cfg
@@ -129,7 +129,7 @@
 # mqttPort              1883
 
 # mqtt topic
-# mqttTopic             /weather/loop
+# mqttTopic             /test
 
 # the compressed rpc message, option:
 #  -1 (no compression)
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index c7763a257a..9683a63503 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -1298,21 +1298,21 @@ bool taosCheckGlobalCfg() {
     taosGetFqdn(tsLocalFqdn);
   }
 
-  snprintf(tsLocalEp, sizeof(tsLocalEp), "%s:%d", tsLocalFqdn, tsServerPort);
+  snprintf(tsLocalEp, sizeof(tsLocalEp), "%s:%u", tsLocalFqdn, tsServerPort);
   uInfo("localEp is: %s", tsLocalEp);
 
   if (tsFirst[0] == 0) {
     strcpy(tsFirst, tsLocalEp);
   } else {
     taosGetFqdnPortFromEp(tsFirst, fqdn, &port);
-    snprintf(tsFirst, sizeof(tsFirst), "%s:%d", fqdn, port);
+    snprintf(tsFirst, sizeof(tsFirst), "%s:%u", fqdn, port);
   }
 
   if (tsSecond[0] == 0) {
     strcpy(tsSecond, tsLocalEp);
   } else {
     taosGetFqdnPortFromEp(tsSecond, fqdn, &port);
-    snprintf(tsSecond, sizeof(tsSecond), "%s:%d", fqdn, port);
+    snprintf(tsSecond, sizeof(tsSecond), "%s:%u", fqdn, port);
   }
 
   taosGetSystemInfo();
diff --git a/tests/pytest/crash_gen.sh b/tests/pytest/crash_gen.sh
index f6be6aae49..df1a9f595b 100755
--- a/tests/pytest/crash_gen.sh
+++ b/tests/pytest/crash_gen.sh
@@ -49,4 +49,4 @@ export PYTHONPATH=$(pwd)/../../src/connector/python/linux/python3
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LIB_DIR
 
 # Now we are all let, and let's see if we can find a crash. Note we pass all params
-python3 ./crash_gen.py $@
+python3.8 ./crash_gen.py $@
diff --git a/tests/pytest/query/queryGroupbySort.py b/tests/pytest/query/queryGroupbySort.py
new file mode 100644
index 0000000000..28ef897f42
--- /dev/null
+++ b/tests/pytest/query/queryGroupbySort.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, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+        self.ts = 1537146000000
+
+    def run(self):
+        tdSql.prepare()
+
+        tdSql.execute(
+            "create table stb(ts timestamp,i int) tags (p_id nchar(20));")
+        tdSql.execute(
+            "insert into tb using stb tags('11231') values (%d, %d) (%d, %d) (%d, %d) (%d, %d)" 
+            % (self.ts, 12, self.ts + 1, 15, self.ts + 2, 15, self.ts + 3, 12))
+
+        tdSql.query(''' select last(ts) p_time,i from stb where p_id='11231' and ts>=%d and ts <=%d 
+            group by i order by time desc limit 100 ''' % (self.ts, self.ts + 4))
+        tdSql.checkRows(2)
+        tdSql.checkData(0, 0, "2018-09-17 09:00:00.003000")
+        tdSql.checkData(1, 0, "2018-09-17 09:00:00.002000")
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
diff --git a/tests/pytest/util/sql.py b/tests/pytest/util/sql.py
index 1e1d02959f..627d712474 100644
--- a/tests/pytest/util/sql.py
+++ b/tests/pytest/util/sql.py
@@ -122,8 +122,8 @@ class TDSql:
         return self.cursor.istype(col, dataType)
 
     def checkData(self, row, col, data):
-        self.checkRowCol(row, col)                
-        if self.queryResult[row][col] != data:            
+        self.checkRowCol(row, col) 
+        if str(self.queryResult[row][col]) != str(data): 
             if isinstance(data, float) and abs(self.queryResult[row][col] - data) <= 0.000001:                
                 tdLog.info("sql:%s, row:%d col:%d data:%f == expect:%f" %
                             (self.sql, row, col, self.queryResult[row][col], data)) 
diff --git a/tests/script/general/insert/insert_drop.sim b/tests/script/general/insert/insert_drop.sim
index cf29656067..80c16ff8e4 100644
--- a/tests/script/general/insert/insert_drop.sim
+++ b/tests/script/general/insert/insert_drop.sim
@@ -19,7 +19,7 @@ $stb = stb
 
 sql drop database $db -x step1
 step1:
-sql create database $db maxtables 10 ctime 30
+sql create database $db ctime 30
 print ====== create tables
 sql use $db
 sql create table $stb (ts timestamp, c1 int) tags(t1 int)
diff --git a/tests/script/general/parser/testSuite.sim b/tests/script/general/parser/testSuite.sim
index dad887a3a2..6790564cc7 100644
--- a/tests/script/general/parser/testSuite.sim
+++ b/tests/script/general/parser/testSuite.sim
@@ -1,99 +1,99 @@
-#sleep 2000
-#run general/parser/alter.sim
-#sleep 2000
-#run general/parser/alter1.sim
-#sleep 2000
-#run general/parser/alter_stable.sim
-#sleep 2000
-#run general/parser/auto_create_tb.sim
-#sleep 2000
-#run general/parser/auto_create_tb_drop_tb.sim
-#sleep 2000
-#run general/parser/col_arithmetic_operation.sim
-#sleep 2000
-#run general/parser/columnValue.sim
-#sleep 2000
-#run general/parser/commit.sim
-#sleep 2000
-#run general/parser/create_db.sim
-#sleep 2000
-#run general/parser/create_mt.sim
-#sleep 2000
-#run general/parser/create_tb.sim
-#sleep 2000
-#run general/parser/dbtbnameValidate.sim
-#sleep 2000
-#run general/parser/fill.sim
-#sleep 2000
-#run general/parser/fill_stb.sim
-#sleep 2000
-##run general/parser/fill_us.sim               #
-#sleep 2000
-#run general/parser/first_last.sim
-#sleep 2000
-#run general/parser/import_commit1.sim
-#sleep 2000
-#run general/parser/import_commit2.sim
-#sleep 2000
-#run general/parser/import_commit3.sim
-#sleep 2000
-##run general/parser/import_file.sim
-#sleep 2000
-#run general/parser/insert_tb.sim
-#sleep 2000
-#run general/parser/tags_dynamically_specifiy.sim
-#sleep 2000
-#run general/parser/interp.sim
-#sleep 2000
-#run general/parser/lastrow.sim
-#sleep 2000
-#run general/parser/limit.sim
-#sleep 2000
-#run general/parser/limit1.sim
-#sleep 2000
-#run general/parser/limit1_tblocks100.sim
-#sleep 2000
-#run general/parser/limit2.sim
-#sleep 2000
-#run general/parser/mixed_blocks.sim
-#sleep 2000
-#run general/parser/nchar.sim
-#sleep 2000
-#run general/parser/null_char.sim
-#sleep 2000
-#run general/parser/selectResNum.sim
-#sleep 2000
-#run general/parser/select_across_vnodes.sim
-#sleep 2000
-#run general/parser/select_from_cache_disk.sim
-#sleep 2000
-#run general/parser/set_tag_vals.sim
-#sleep 2000
-#run general/parser/single_row_in_tb.sim
-#sleep 2000
-#run general/parser/slimit.sim
-#sleep 2000
-#run general/parser/slimit1.sim
-#sleep 2000
-#run general/parser/slimit_alter_tags.sim
-#sleep 2000
-#run general/parser/tbnameIn.sim
-#sleep 2000
-#run general/parser/slimit_alter_tags.sim  # persistent failed
-#sleep 2000
-#run general/parser/join.sim
-#sleep 2000
-#run general/parser/join_multivnode.sim
-#sleep 2000
-#run general/parser/projection_limit_offset.sim
-#sleep 2000
-#run general/parser/select_with_tags.sim
-#sleep 2000
-#run general/parser/groupby.sim
-#sleep 2000
-#run general/parser/tags_filter.sim
-#sleep 2000
-#run general/parser/topbot.sim
+sleep 2000
+run general/parser/alter.sim
+sleep 2000
+run general/parser/alter1.sim
+sleep 2000
+run general/parser/alter_stable.sim
+sleep 2000
+run general/parser/auto_create_tb.sim
+sleep 2000
+run general/parser/auto_create_tb_drop_tb.sim
+sleep 2000
+run general/parser/col_arithmetic_operation.sim
+sleep 2000
+run general/parser/columnValue.sim
+sleep 2000
+run general/parser/commit.sim
+sleep 2000
+run general/parser/create_db.sim
+sleep 2000
+run general/parser/create_mt.sim
+sleep 2000
+run general/parser/create_tb.sim
+sleep 2000
+run general/parser/dbtbnameValidate.sim
+sleep 2000
+run general/parser/fill.sim
+sleep 2000
+run general/parser/fill_stb.sim
+sleep 2000
+#run general/parser/fill_us.sim               #
+sleep 2000
+run general/parser/first_last.sim
+sleep 2000
+run general/parser/import_commit1.sim
+sleep 2000
+run general/parser/import_commit2.sim
+sleep 2000
+run general/parser/import_commit3.sim
+sleep 2000
+#run general/parser/import_file.sim
+sleep 2000
+run general/parser/insert_tb.sim
+sleep 2000
+run general/parser/tags_dynamically_specifiy.sim
+sleep 2000
+run general/parser/interp.sim
+sleep 2000
+run general/parser/lastrow.sim
+sleep 2000
+run general/parser/limit.sim
+sleep 2000
+run general/parser/limit1.sim
+sleep 2000
+run general/parser/limit1_tblocks100.sim
+sleep 2000
+run general/parser/limit2.sim
+sleep 2000
+run general/parser/mixed_blocks.sim
+sleep 2000
+run general/parser/nchar.sim
+sleep 2000
+run general/parser/null_char.sim
+sleep 2000
+run general/parser/selectResNum.sim
+sleep 2000
+run general/parser/select_across_vnodes.sim
+sleep 2000
+run general/parser/select_from_cache_disk.sim
+sleep 2000
+run general/parser/set_tag_vals.sim
+sleep 2000
+run general/parser/single_row_in_tb.sim
+sleep 2000
+run general/parser/slimit.sim
+sleep 2000
+run general/parser/slimit1.sim
+sleep 2000
+run general/parser/slimit_alter_tags.sim
+sleep 2000
+run general/parser/tbnameIn.sim
+sleep 2000
+run general/parser/slimit_alter_tags.sim  # persistent failed
+sleep 2000
+run general/parser/join.sim
+sleep 2000
+run general/parser/join_multivnode.sim
+sleep 2000
+run general/parser/projection_limit_offset.sim
+sleep 2000
+run general/parser/select_with_tags.sim
+sleep 2000
+run general/parser/groupby.sim
+sleep 2000
+run general/parser/tags_filter.sim
+sleep 2000
+run general/parser/topbot.sim
 sleep 2000
 run general/parser/union.sim
 sleep 2000
diff --git a/tests/script/general/table/limit.sim b/tests/script/general/table/limit.sim
index 6287807954..18597f2e1c 100644
--- a/tests/script/general/table/limit.sim
+++ b/tests/script/general/table/limit.sim
@@ -17,7 +17,7 @@ $db = $dbPrefix . $i
 $tb = $tbPrefix . $i
 
 print =================== step 0
-sql create database $db maxtables 129
+sql create database $db
 sql use $db
 sql show vgroups
 if $rows != 0 then 
diff --git a/tests/script/unique/vnode/replica3_vgroup.sim b/tests/script/unique/vnode/replica3_vgroup.sim
index 09ca261a06..11295ba0a4 100644
--- a/tests/script/unique/vnode/replica3_vgroup.sim
+++ b/tests/script/unique/vnode/replica3_vgroup.sim
@@ -26,7 +26,7 @@ sleep 3000
 
 print =================== step 1 
 
-sql create database $db replica 3 maxtables 100
+sql create database $db replica 3
 sql use $db
 sql create table st (ts timestamp, speed int) tags (t1 int)
 sleep 3001