diff --git a/xCAT-test/autotest/testcase/confignics/mtu_set_clean b/xCAT-test/autotest/testcase/confignics/mtu_set_clean
index adbc8db69..f5b12308f 100755
--- a/xCAT-test/autotest/testcase/confignics/mtu_set_clean
+++ b/xCAT-test/autotest/testcase/confignics/mtu_set_clean
@@ -5,7 +5,7 @@ function test_ip()
     VALID_CHECK=$(echo $IP|awk -F. '$1<=255&&$2<=255&&$3<=255&&$4<=255{print "yes"}')
     if echo $IP|grep -E "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$">/dev/null; then
         if [ ${VALID_CHECK:-no} == "yes" ]; then
-            echo $1; 
+            echo $1;
         else
             return 1;
         fi
@@ -33,12 +33,12 @@ MASTERIP=""
 NETWORKNAME=""
 MASTERIP=`lsdef -t site -i master -c  2>&1 | awk -F'=' '{print $2}'`;
 MASTERIP=$(get_master_ip $MASTERIP);
-if [[ `tabdump networks |grep $MASTERIP` = "" ]]; then 
+if [[ `tabdump networks |grep $MASTERIP` = "" ]]; then
     makenetworks
 fi
 NETWORKNAME=`tabdump networks |grep $MASTERIP|awk -F'"' '{print $2}'`;
 echo $NETWORKNAME,$MASTERIP;
-if [[ $NETWORKNAME = "" ]] || [[ $MASTERIP = "" ]];then 
+if [[ $NETWORKNAME = "" ]] || [[ $MASTERIP = "" ]];then
     exit 2;
 else
     if [ $1 = "S" ] ;then