diff --git a/xCAT-test/autotest/testcase/genesis/test.sh b/xCAT-test/autotest/testcase/genesis/test.sh
index a550f15ac..e4db45273 100755
--- a/xCAT-test/autotest/testcase/genesis/test.sh
+++ b/xCAT-test/autotest/testcase/genesis/test.sh
@@ -19,7 +19,7 @@ TESTNODE_IP="192.168.3.1"
 
 MASTER_PRIVATE_IP="192.168.1.1"
 MASTER_PRIVATE_NETMASK="255.255.0.0"
-MASTER_PRIVATE_NETWORK="192.168.0.0-255_255_0_0"
+MASTER_PRIVATE_NETWORK="192_168_0_0-255_255_0_0"
 
 
 function check_destiny() {