(rule
 (package ppxlib)
 (alias runtest)
 ; #install_printer is not working on older compilers for some reason
 ; This is fine as this does not need to be tested on older compilers anyway
 (enabled_if
  (>= %{ocaml_version} 5.1))
 (deps
  (:test test.ml)
  (package ppxlib))
 (action
  (chdir
   %{project_root}
   (progn
    (run expect-test %{test})
    (diff? %{test} %{test}.corrected)))))