diff --git a/t/plugin/authz-keycloak4.t b/t/plugin/authz-keycloak4.t
index 4a422a2411c6..974fe3b2e355 100644
--- a/t/plugin/authz-keycloak4.t
+++ b/t/plugin/authz-keycloak4.t
@@ -104,7 +104,7 @@ Success! Data written to: kv/apisix/foo
                 }),
             })
             if res.status == 200 then
-                ngx.print("success")
+                ngx.print("success\n")
             end
         }
     }