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 1b9a943c8..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