laravel 5 custom config directories

I'm trying to create a modular application in laravel, So in my app/Modules directory, I create folder for each module.

Inside each module lies ( models, controllers, views) directories.

I want to put some config vairables for some module , So created config/config.php inside each module, but I can't make it work..

The content of the my config file is:

<?php
return [
    'test' => 'good',   
];

When I try to access this config variable from my controllers like that: echo config('test'); it doesn't work.

What is missing ?

via Chebli Mohamed