diff --git a/xCAT-test/autotest/testcase/installation/ubuntu_full_installation_vm_docker b/xCAT-test/autotest/testcase/installation/ubuntu_full_installation_vm_docker
index b2fa46c92..56f5d9953 100644
--- a/xCAT-test/autotest/testcase/installation/ubuntu_full_installation_vm_docker
+++ b/xCAT-test/autotest/testcase/installation/ubuntu_full_installation_vm_docker
@@ -28,7 +28,7 @@ cmd:rpower $$CN boot
 check:rc==0
 cmd:sleep 40
 cmd:lsdef -l $$CN | grep status
-cmd:sleep 3600
+cmd:sleep 2400
 check:rc==0
 cmd:ping $$CN -c 3
 check:output=~64 bytes from $$CN
@@ -44,4 +44,6 @@ cmd:xdsh $$CN "docker pull $$DOCKERIMAGE"
 check:rc==0
 cmd:rmdef -t osimage -o __GETNODEATTR($$CN,os)__-__GETNODEATTR($$CN,arch)__-install-dockerhost
 check:rc==0
+cmd: chdef $$CN postbootscripts=
+check:rc==0
 end