diff --git a/tests/pytest/util/dnodes.py b/tests/pytest/util/dnodes.py
index edb3d761cb..22e6127973 100644
--- a/tests/pytest/util/dnodes.py
+++ b/tests/pytest/util/dnodes.py
@@ -162,7 +162,11 @@ class TDDnode:
     def setAsan(self, value):
         self.asan = value
         if value:
-            self.execPath = os.path.abspath(self.path + "/tests/script/sh/exec.sh")        
+            selfPath = os.path.dirname(os.path.realpath(__file__))
+            if ("community" in selfPath):
+                self.execPath = os.path.abspath(self.path + "/community/tests/script/sh/exec.sh")        
+            else:
+                self.execPath = os.path.abspath(self.path + "/tests/script/sh/exec.sh")        
 
     def getDataSize(self):
         totalSize = 0
@@ -670,8 +674,13 @@ class TDDnodes:
     def setAsan(self, value):
         self.asan = value
         if value:
-            self.stopDnodesPath = os.path.abspath(self.path + "/tests/script/sh/stop_dnodes.sh")
-            self.stopDnodesSigintPath = os.path.abspath(self.path + "/tests/script/sh/sigint_stop_dnodes.sh")
+            selfPath = os.path.dirname(os.path.realpath(__file__))
+            if ("community" in selfPath):
+                self.stopDnodesPath = os.path.abspath(self.path + "/community/tests/script/sh/stop_dnodes.sh")
+                self.stopDnodesSigintPath = os.path.abspath(self.path + "/community/tests/script/sh/sigint_stop_dnodes.sh")
+            else:    
+                self.stopDnodesPath = os.path.abspath(self.path + "/tests/script/sh/stop_dnodes.sh")
+                self.stopDnodesSigintPath = os.path.abspath(self.path + "/tests/script/sh/sigint_stop_dnodes.sh")
             tdLog.info("run in address sanitizer mode")
 
     def setKillValgrind(self, value):
diff --git a/tests/script/sh/checkAsan.sh b/tests/script/sh/checkAsan.sh
index 8e5738e911..5dfb19e0ae 100755
--- a/tests/script/sh/checkAsan.sh
+++ b/tests/script/sh/checkAsan.sh
@@ -3,7 +3,7 @@
 set +e
 #set -x
 
-export LD_PRELOAD=
+unset LD_PRELOAD
 SCRIPT_DIR=`dirname $0`
 cd $SCRIPT_DIR/../
 SCRIPT_DIR=`pwd`
diff --git a/tests/script/sh/exec.sh b/tests/script/sh/exec.sh
index ad671631a9..c8cb121b8a 100755
--- a/tests/script/sh/exec.sh
+++ b/tests/script/sh/exec.sh
@@ -11,7 +11,7 @@
 set +e
 #set -x
 
-export LD_PRELOAD=
+unset LD_PRELOAD
 UNAME_BIN=`which uname`
 OS_TYPE=`$UNAME_BIN`
 
diff --git a/tests/script/sh/sigint_stop_dnodes.sh b/tests/script/sh/sigint_stop_dnodes.sh
index 12b58225de..a398e00772 100755
--- a/tests/script/sh/sigint_stop_dnodes.sh
+++ b/tests/script/sh/sigint_stop_dnodes.sh
@@ -3,7 +3,7 @@
 set +e
 #set -x
 
-export LD_PRELOAD=
+unset LD_PRELOAD
 UNAME_BIN=`which uname`
 OS_TYPE=`$UNAME_BIN`
 
diff --git a/tests/script/sh/stop_dnodes.sh b/tests/script/sh/stop_dnodes.sh
index 34777ccb59..ce2d7144f9 100755
--- a/tests/script/sh/stop_dnodes.sh
+++ b/tests/script/sh/stop_dnodes.sh
@@ -3,7 +3,7 @@
 set +e
 #set -x
 
-export LD_PRELOAD=
+unset LD_PRELOAD
 UNAME_BIN=`which uname`
 OS_TYPE=`$UNAME_BIN`
 
diff --git a/tests/system-test/test.sh b/tests/system-test/pytest.sh
similarity index 98%
rename from tests/system-test/test.sh
rename to tests/system-test/pytest.sh
index 6fbc9961d6..f6d081da2a 100755
--- a/tests/system-test/test.sh
+++ b/tests/system-test/pytest.sh
@@ -69,10 +69,11 @@ echo "ExcuteCmd:" $*
 AsanFile=$ASAN_DIR/psim.asan
 echo "AsanFile:" $AsanFile
 
+unset LD_PRELOAD
 export LD_PRELOAD=libasan.so.5
 $* -a 2> $AsanFile
 
-export LD_PRELOAD=
+unset LD_PRELOAD
 AsanFileLen=`cat $AsanFile | wc -l`
 while [ $AsanFileLen -lt 10 ]
 do