diff --git a/xCAT-test/autotest/testcase/genesis/cases0 b/xCAT-test/autotest/testcase/genesis/cases0
index b38389827..9d929016e 100644
--- a/xCAT-test/autotest/testcase/genesis/cases0
+++ b/xCAT-test/autotest/testcase/genesis/cases0
@@ -1,5 +1,5 @@
 start:nodeset_shell_lzma
-os:rhels
+os:rhels8
 label:others,genesis
 description: verify could log in genesis shell lzma compression
 cmd:yum install -y https://rpmfind.net/linux/centos/8-stream/PowerTools/__GETNODEATTR($$CN,arch)__/os/Packages/xz-lzma-compat-5.2.4-3.el8.__GETNODEATTR($$CN,arch)__.rpm