diff --git a/tests/script/sh/checkAsan.sh b/tests/script/sh/checkAsan.sh
index 7df17b22da1c8a8c3b7cf95315a3aea417d56eae..72257227916785de3d174349d4c83d3302064295 100755
--- a/tests/script/sh/checkAsan.sh
+++ b/tests/script/sh/checkAsan.sh
@@ -39,7 +39,7 @@ python_error=`cat ${LOG_DIR}/*.info | grep -w "stack" | wc -l`
 # /root/TDengine/source/libs/scalar/src/sclvector.c:1075:66: runtime error: signed integer overflow: 9223372034707292160 + 1668838476672 cannot be represented in type 'long int'
 # /root/TDengine/source/common/src/tdataformat.c:1876:7: runtime error: signed integer overflow: 8252423483843671206 + 2406154664059062870 cannot be represented in type 'long int'
 
-runtime_error=`cat ${LOG_DIR}/*.asan | grep "runtime error" | grep -v "trees.c:873" | grep -v "sclfunc.c.*outside the range of representable values of type"| grep -v "signed integer overflow" | wc -l`
+runtime_error=`cat ${LOG_DIR}/*.asan | grep "runtime error" | grep -v "trees.c:873" | grep -v "sclfunc.c.*outside the range of representable values of type"| grep -v "signed integer overflow" |grep -v "strerror.c"| grep -v "asan_malloc_linux.cc" |wc -l`
 
 echo -e "\033[44;32;1m"asan error_num: $error_num"\033[0m"
 echo -e "\033[44;32;1m"asan memory_leak: $memory_leak"\033[0m"
diff --git a/tests/system-test/2-query/insert_null_none.py b/tests/system-test/2-query/insert_null_none.py
index cf5636fb1fa5599cde9f096915667f0f4af7a3e8..4304dee89ef71b0d44c26567f393404fea8bedc2 100755
--- a/tests/system-test/2-query/insert_null_none.py
+++ b/tests/system-test/2-query/insert_null_none.py
@@ -24,7 +24,7 @@ from util.dnodes import tdDnodes
 from util.dnodes import *
 
 class TDTestCase:
-    updatecfgDict = {'maxSQLLength':1048576,'debugFlag': 143 ,"querySmaOptimize":1}
+    updatecfgDict = {'maxSQLLength':1048576,'debugFlag': 131 ,"querySmaOptimize":1}
     
     def init(self, conn, logSql, replicaVar):
         tdLog.debug("start to execute %s" % __file__)
diff --git a/tests/system-test/6-cluster/5dnode3mnodeDrop.py b/tests/system-test/6-cluster/5dnode3mnodeDrop.py
index 45830af698e3e65ff3a02c2b0a9c53770b3c50c4..9dd3c568054948d7062c2f87f145149509b1b575 100644
--- a/tests/system-test/6-cluster/5dnode3mnodeDrop.py
+++ b/tests/system-test/6-cluster/5dnode3mnodeDrop.py
@@ -121,7 +121,7 @@ class TDTestCase:
     def check3mnode(self):
         count=0
         while count < 10:
-            time.sleep(1)
+            time.sleep(0.1)
             tdSql.query("select * from information_schema.ins_mnodes;")
             if tdSql.checkRows(3) :
                 tdLog.debug("mnode is  three nodes")
@@ -158,7 +158,7 @@ class TDTestCase:
     def check3mnode1off(self):
         count=0
         while count < 10:
-            time.sleep(1)
+            time.sleep(0.1)
             tdSql.query("select * from information_schema.ins_mnodes;")
             if tdSql.checkRows(3) :
                 tdLog.debug("mnode is  three nodes")
@@ -190,7 +190,7 @@ class TDTestCase:
     def check3mnode2off(self):
         count=0
         while count < 40:
-            time.sleep(1)
+            time.sleep(0.1)
             tdSql.query("select * from information_schema.ins_mnodes;")
             if tdSql.checkRows(3) :
                 tdLog.debug("mnode is  three nodes")
@@ -220,7 +220,7 @@ class TDTestCase:
     def check3mnode3off(self):
         count=0
         while count < 10:
-            time.sleep(1)
+            time.sleep(0.1)
             tdSql.query("select * from information_schema.ins_mnodes;")
             if tdSql.checkRows(3) :
                 tdLog.debug("mnode is  three nodes")
@@ -280,32 +280,32 @@ class TDTestCase:
 
         #  drop follower of mnode
         dropcount =0
-        while dropcount <= 10:
+        while dropcount <= 5:
             for i in range(1,3):
                 tdLog.debug("drop mnode on dnode %d"%(i+1))
                 tdSql.execute("drop mnode on dnode %d"%(i+1))
                 tdSql.query("select * from information_schema.ins_mnodes;")
                 count=0
                 while count<10:
-                    time.sleep(1)
+                    time.sleep(0.1)
                     tdSql.query("select * from information_schema.ins_mnodes;")
-                    if tdSql.checkRows(2):
+                    if tdSql.queryRows == 2:
                         tdLog.debug("drop mnode %d successfully"%(i+1))
                         break
                     count+=1
-                self.wait_for_transactions(20)
+                self.wait_for_transactions(100)
 
                 tdLog.debug("create mnode on dnode %d"%(i+1))
                 tdSql.execute("create mnode on dnode %d"%(i+1))
                 count=0
                 while count<10:
-                    time.sleep(1)
+                    time.sleep(0.1)
                     tdSql.query("select * from information_schema.ins_mnodes;")
-                    if tdSql.checkRows(3):
+                    if tdSql.queryRows == 3:
                         tdLog.debug("create mnode %d successfully"%(i+1))
                         break
                     count+=1
-                self.wait_for_transactions(20)
+                self.wait_for_transactions(100)
             dropcount+=1
         self.check3mnode()
 
@@ -314,13 +314,13 @@ class TDTestCase:
         while count<timeout:
             time.sleep(1)
             tdSql.query("show transactions;")
-            print(tdSql.queryRows)
+            # print(tdSql.queryRows)
             if tdSql.queryRows == 0 :
                 tdLog.debug("transactions completed successfully")
                 break
             count+=1
         if count >= timeout:
-            tdLog.debug("transactions not finished before timeout (%d secs)", timeout)
+            tdLog.debug("transactions not finished before timeout (%d secs)"%timeout)
 
     def getConnection(self, dnode):
         host = dnode.cfgDict["fqdn"]