diff --git a/xCAT-test/autotest/testcase/installation/Full_installation_flat_p8_le b/xCAT-test/autotest/testcase/installation/Full_installation_flat_p8_le
index 0b7779db2..107da18b7 100644
--- a/xCAT-test/autotest/testcase/installation/Full_installation_flat_p8_le
+++ b/xCAT-test/autotest/testcase/installation/Full_installation_flat_p8_le
@@ -24,7 +24,8 @@ cmd:makeconservercf $$CN
 check:rc==0
 cmd:cat /etc/conserver.cf | grep $$CN
 check:output=~$$CN
-cmd:chdef -t node -o $$CN postscripts=setupntp
+cmd:if [ "__GETNODEATTR($$CN,os)__" != "sles12.1" ];then chdef -t node -o $$CN postscripts=setupntp; fi
+cmd:lsdef -l $$CN
 check:rc==0
 cmd:nodeset $$CN osimage=__GETNODEATTR($$CN,os)__-__GETNODEATTR($$CN,arch)__-install-compute
 check:rc==0
diff --git a/xCAT-test/autotest/testcase/installation/reg_linux_diskfull_installation_flat b/xCAT-test/autotest/testcase/installation/reg_linux_diskfull_installation_flat
index 130503f00..0800aa5d7 100644
--- a/xCAT-test/autotest/testcase/installation/reg_linux_diskfull_installation_flat
+++ b/xCAT-test/autotest/testcase/installation/reg_linux_diskfull_installation_flat
@@ -29,7 +29,8 @@ cmd:a=0;while true; do [ $a -eq 100 ] && exit 1;output=$(makedhcp -q $$CN);[ $?
 check:rc==0
 cmd:copycds $$ISO 
 check:rc==0
-cmd:chdef -t node -o $$CN postscripts=setupntp
+cmd:if [ "__GETNODEATTR($$CN,os)__" != "sles12.1" ];then chdef -t node -o $$CN postscripts=setupntp; fi
+cmd:lsdef -l $$CN
 check:rc==0
 cmd:nodeset $$CN osimage=__GETNODEATTR($$CN,os)__-__GETNODEATTR($$CN,arch)__-install-compute
 check:rc==0