anchor.diff:  		fun cleanup/1,
   		[
   			fun run_require_error/1,
  -			fun run_callback/1
  -		]
  +			fun run_callback/1		]
   	}.
   
   run_require_error(Pid) ->
  
positive.code: -ifdef(TEST).
  
  setup() -> 
      {ok,Pid} = lua:start_link("../scripts/main.lua"), Pid.
      
  cleanup(Pid) ->
      gen_server:call(Pid, stop).
  
negative.code:             lua:reply(Sender, [{pid, Pid}]),
              callback_test_process(Pid)
      end.
  
  run_callback(LuaPid) ->
  	ok = lua:require(LuaPid, [<<"../scripts/libs">>,<<"../test_scripts">>,<<"../test_scripts/callback_test">>], <<"callback_test">>),
      EchoPid = spawn(?MODULE, callback_test_process, [self()]),
  