title: Prestashop: Custom module not showing in back-office
body: <p>I want to create a custom module in prestashop but it does not show up in the modules-tab in the back-office.</p>
  
  <p>I created a very basic test-module but even this does not show up in back-office.</p>
  
  <p>I have a single text.php file in the folder: modules/test
  This is the code of the file:</p>
  
  <pre><code>&lt;?php
  
  if (!defined('_PS_VERSION_'))
      exit;
  
  class Test extends Module
  {
      public function __construct()
      {
          parent::__construct();  
  
          $this-&gt;name = 'Test';
          $this-&gt;tab = 'Test';
          $this-&gt;version = 1.0;
          $this-&gt;author = 'Test';
          $this-&gt;need_instance = 0;
  
          $this-&gt;displayName = 'TEST';
          $this-&gt;description = 'TEST';
      }
  
      public function install()
      {
          return (parent::install());
      }
  }
  </code></pre>
  
  <p>As far as I understand this is enough for a basic module to show up in the back-offices's modules tab.</p>
  
  <p>Any idea what might be wrong?</p>