diff --git a/xCAT-test/autotest/testcase/install_xCAT/case0 b/xCAT-test/autotest/testcase/install_xCAT/case0
index e41499802..f473b099b 100644
--- a/xCAT-test/autotest/testcase/install_xCAT/case0
+++ b/xCAT-test/autotest/testcase/install_xCAT/case0
@@ -30,6 +30,10 @@ cmd:diff /tmp/known_host_keys /tmp/current_os_host_keys
 check:output!~>
 cmd:rm -f /tmp/known_host_keys /tmp/current_os_host_keys
 check:rc==0
+
+# Obtain the highest version of TLS supported by OpenSSL/TLS.
+cmd:openssl s_client --help 2>&1 | grep "\-tls1" | awk '{print $1}' | sort | tail -1
+check:rc==0
 end
 
 start:install_xCAT_on_ubuntu
@@ -76,4 +80,8 @@ cmd:diff /tmp/known_host_keys /tmp/current_os_host_keys
 check:output!~>
 cmd:rm -f /tmp/known_host_keys /tmp/current_os_host_keys
 check:rc==0
+
+# Obtain the highest version of TLS supported by OpenSSL/TLS.
+cmd:openssl s_client --help 2>&1 | grep "\-tls1" | awk '{print $1}' | sort | tail -1
+check:rc==0
 end