autoload config for PropelBundle tests with Symfony2

gistfile1.txt

//had to add these prefixes to my autoload for the php-unit tests to run
//app/autoload.php

$loader->registerPrefixes(array(
    'Twig_Extensions_' => __DIR__.'/../vendor/twig-extensions/lib',
    'Twig_'            => __DIR__.'/../vendor/twig/lib',
    'BaseObject'       => __DIR__.'/../vendor/propel/runtime/lib/om',
    'Persistent'       => __DIR__.'/../vendor/propel/runtime/lib/om',
    'Propel'           => __DIR__.'/../vendor/propel/runtime/lib',

));



//MediaFileTest.php
<?php

namespace Xosofox\MedusaBundle\Tests\Model;

use \Xosofox\MedusaBundle\Model\MediaFile;
use \BaseObject;

class MediaFileTest extends \PHPUnit_Framework_TestCase
{
    public function testAnalyse()
    {
        $f=new MediaFile();
        $f->setFilepath("/var/wwwroot/medusa/mountpoint/Music/MP3 Unsorted/Aerosmith - I Dont Want To Miss A Thing.mp3");
        $f->analyse();
        $this->assertEquals("Aerosmith",$f->getArtist());
        $this->assertEquals("I Don't Want To Miss A Thing",$f->getTitle());
    }

}

Any idea/hint where to look for it? So I could try replicate the issue with a vanilla project and maybe create a fix