diff --git a/xCAT-test/autotest/testcase/switchdiscover/cases0 b/xCAT-test/autotest/testcase/switchdiscover/cases0
index 084f15de2..7de8bb7e3 100644
--- a/xCAT-test/autotest/testcase/switchdiscover/cases0
+++ b/xCAT-test/autotest/testcase/switchdiscover/cases0
@@ -35,7 +35,7 @@ check:output=~xml
 cmd:rm -rf switchdiscover_range_r.log
 cmd:switchdiscover --range $$range -r > switchdiscover_range_r.log
 check:rc==0
-cmd:if [ "__GETNODEATTR($$CN,os__" != "sles11.4" ]; then cat switchdiscover_range_r.log | grep "/usr/bin/nmap -sn -oX - $$range"; else cat switchdiscover_range_r.log | grep "/usr/bin/nmap -sP -oX - $$range";fi
+cmd:if [ "__GETNODEATTR($$CN,os)__" != "sles11.4" ]; then cat switchdiscover_range_r.log | grep "/usr/bin/nmap -sn -oX - $$range"; else cat switchdiscover_range_r.log | grep "/usr/bin/nmap -sP -oX - $$range";fi
 check:output=~/usr/bin/nmap -s(n|P) -oX - $$range
 cmd:rm -rf switchdiscover_range_r.log
 end
@@ -64,7 +64,7 @@ check:output=~groups=switch
 cmd:rm -rf switchdiscover_range_z_V.log
 cmd:switchdiscover --range $$range -z -V > switchdiscover_range_z_V.log
 check:rc==0
-cmd:if [ "__GETNODEATTR($$CN,os__" != "sles11.4" ]; then cat switchdiscover_range_z_V.log | grep "Process command: /usr/bin/nmap -sn -oX - $$range"; else cat switchdiscover_range_z_V.log | grep "Process command: /usr/bin/nmap -sP -oX - $$range";fi
+cmd:if [ "__GETNODEATTR($$CN,os)__" != "sles11.4" ]; then cat switchdiscover_range_z_V.log | grep "Process command: /usr/bin/nmap -sn -oX - $$range"; else cat switchdiscover_range_z_V.log | grep "Process command: /usr/bin/nmap -sP -oX - $$range";fi
 check:output=~Process command: /usr/bin/nmap -s(n|P) -oX - $$range
 cmd:rm -rf switchdiscover_range_z_V.log
 end