diff --git a/t/163-ssl-two-verification.t b/t/163-ssl-two-verification.t
index f2440a72..2ff3eeb1 100644
--- a/t/163-ssl-two-verification.t
+++ b/t/163-ssl-two-verification.t
@@ -11,7 +11,7 @@ my $openssl_version = eval { `$NginxBinary -V 2>&1` };
 if ($openssl_version =~ m/built with OpenSSL (0\S*|1\.0\S*|1\.1\.0\S*)/) {
     plan(skip_all => "too old OpenSSL, need 1.1.1, was $1");
 } else {
-    plan tests => repeat_each() * (blocks() * 6);
+    plan tests => repeat_each() * (blocks() * 7);
 }
 
 $ENV{TEST_NGINX_HTML_DIR} ||= html_dir();
@@ -40,6 +40,9 @@ __DATA__
         ssl_verify_client on;
         ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
 
+        log_by_lua_block {
+            ngx.log(ngx.INFO, "ssl_client_s_dn: ", ngx.var.ssl_client_s_dn)
+        }
         return 'it works!\n';
     }
 --- stream_server_config
@@ -94,6 +97,7 @@ close: 1 nil
 
 --- error_log
 lua ssl server name: "test.com"
+ssl_client_s_dn: emailAddress=agentzh@gmail.com,CN=test.com,OU=OpenResty,O=OpenResty,L=San Francisco,ST=California,C=US
 
 --- no_error_log
 [error]