ZF2 Unit Test Can't Find Service

I'm unit testing a ZF2 Controller, below is the test class:

<?php
class RestControllerTest extends AbstractHttpControllerTestCase
{
    public function setUp()
    {
        Bootstrap::init();
        $this->setApplicationConfig(Bootstrap::getConfig());
        parent::setup();
    }

    public function testCreate()
    {
        $paramsArr = array(/** Params Here **/);
        $this->dispatch('/transcode', 'POST', $paramsArr);
        $this->assertResponseStatusCode(204);
        $this->assertControllerName('Transcode\Controller\Rest');
        $this->assertMatchedRouteName('transcode');
    }
}

My unit test is failing, indicating a ServiceNotFoundException on logger.transcode, which is attached to the eventmanager onBootstrap of the Transcode module:

public function onBootstrap(MvcEvent $e)
    {
        $eventManager   = $e->getApplication()->getEventManager();
        $app            = $e->getTarget();
        $serviceManager = $app->getServiceManager();
        $eventManager->attach($serviceManager->get('Transcode\Listener'));
    }

Transcode\Listener is instantiated via a Factory:

public function createService(ServiceLocatorInterface $serviceLocator)
{
    $logger = $serviceLocator->get('logger.transcode');
    $service = new TranscodeListener($logger);
    return $service;
}

And finally, logger.transcode is set via a config file which creates logger.transcode as an abstract factory in the EnliteMonolog module.

Any idea why the unit test can't attach the listener to workflow?