diff --git a/xCAT-test/autotest/testcase/installation/aix_diskless_installation b/xCAT-test/autotest/testcase/installation/aix_diskless_installation
index 3e7709203..f5334c712 100644
--- a/xCAT-test/autotest/testcase/installation/aix_diskless_installation
+++ b/xCAT-test/autotest/testcase/installation/aix_diskless_installation
@@ -47,7 +47,7 @@ check:output=~spot/autotestcosi/usr
 check:output=~autotestcosi_paging
 cmd:rnetboot $$CN
 check:rc==0
-cmd:sleep 600
+cmd:sleep 300 
 cmd:lsdef -l $$CN| grep status
 check:output=~booted
 cmd:xdsh $$CN date
diff --git a/xCAT-test/autotest/testcase/installation/linux_diskless_installation b/xCAT-test/autotest/testcase/installation/linux_diskless_installation
index d02eeca45..ec0228350 100644
--- a/xCAT-test/autotest/testcase/installation/linux_diskless_installation
+++ b/xCAT-test/autotest/testcase/installation/linux_diskless_installation
@@ -31,7 +31,7 @@ cmd:nodeset $$CN netboot
 check:rc==0
 cmd:rnetboot $$CN
 check:rc==0
-cmd:sleep 600
+cmd:sleep 300 
 cmd:lsdef -l $$CN | grep status
 check:output=~booted
 cmd:xdsh $$CN date