diff --git a/xCAT-test/autotest/testcase/mkdef/cases0 b/xCAT-test/autotest/testcase/mkdef/cases0
index 3646840c6..b360587d6 100644
--- a/xCAT-test/autotest/testcase/mkdef/cases0
+++ b/xCAT-test/autotest/testcase/mkdef/cases0
@@ -164,8 +164,7 @@ os:Linux
 description:test mkdef works as design when netname exists.
 label:mn_only,ci_test,db
 cmd:netname=`lsdef -t network |cut -d" " -f1 |sed -n '1p'`;mkdef -t network -o $netname 
-check:rc==0
-check:output=~(already exists)
+check:rc==1
 end
 
 start:mkdef_netname_notexist_without_net_mask