diff --git a/xCAT-test/autotest/testcase/discovery/bmc_discovery_only b/xCAT-test/autotest/testcase/discovery/bmc_discovery_only
index 924547e7d..0b871c218 100644
--- a/xCAT-test/autotest/testcase/discovery/bmc_discovery_only
+++ b/xCAT-test/autotest/testcase/discovery/bmc_discovery_only
@@ -1,6 +1,6 @@
 start:bmc_discovery_only
-description: test the whole process of bmc discovery 
-Attribute: $$NODE_DISCOVERY_TARGET:The machine plan to be discovered. $$NODE_DISCOVERY_BMC_DYNAMIC_IP_RANGE :The valid dymanic ip range which has been configured in DHCP server and can offer service.   
+description: test the whole process of bmc discovery
+Attribute: $$NODE_DISCOVERY_TARGET:The machine plan to be discovered. $$NODE_DISCOVERY_BMC_DYNAMIC_IP_RANGE :The valid dymanic ip range which has been configured in DHCP server and can offer service.
 cmd:/opt/xcat/share/xcat/tools/autotest/testcase/discovery/discovery_test --discovery_target_node $$NODE_DISCOVERY_TARGET --bmc_dynamic_ip_range $$NODE_DISCOVERY_BMC_DYNAMIC_IP_RANGE --bmc_discovery_only
 check:rc==0
 end