diff --git a/xCAT-test/autotest/testcase/go-xcat/case4 b/xCAT-test/autotest/testcase/go-xcat/case4
index 54e0dce6e..79137ac6f 100644
--- a/xCAT-test/autotest/testcase/go-xcat/case4
+++ b/xCAT-test/autotest/testcase/go-xcat/case4
@@ -1,5 +1,5 @@
 start:go_xcat_update_case1
-description:test go_xcat with the option update 
+description:test go_xcat with the option update
 os:Linux
 cmd:if xdsh $$CN "zypper -h"; then  xdsh $$CN "zypper remove -y *xCAT*"; elif xdsh $$CN "yum -h";then xdsh $$CN  "yum remove -y *xCAT*"; elif xdsh $$CN "apt-get -h";then xdsh $$CN "apt-get purge perl-xcat xcat-client xcat-server xcat -y"; else echo "Sorry,this is not supported os"; fi
 cmd:if grep Ubuntu /etc/*release;then xdsh $$CN "dpkg -l |grep -i perl-xcat";else xdsh $$CN "rpm -qa |grep -i perl-xcat";fi