Symfony 2.8 : inject mocked repository in a test controller

I try to create a test for a custom controller. In this one, this is what is executed:

Code

$users = $this->getDoctrine()
                ->getRepository('MyBundle:User')
                ->findAllOrderedByName();

In the test controller, this is what I am doing:

$entityManager = $this
            ->getMockBuilder('Doctrine\ORM\EntityManager')
            ->setMethods(['getRepository', 'clear'])
            ->disableOriginalConstructor()
            ->getMock();

        $entityManager
            ->expects($this->once())
            ->method('getRepository')
            ->with('MyBundle:User')
            ->will($this->returnValue($userRepositoryMock));


        // Set the client
        $client = static::createClient();
        $client->getContainer()->set('doctrine.orm.default_entity_manager', $entityManager);

Problem

But at the end the test fails because my mock seems to no be used:

tests\MyBundle\Controller\ListingControllerTest::testAllAction Expectation failed for method name is equal to string:getRepository when invoked 1 time(s). Method was expected to be called 1 times, actually called 0 times.

Any idea ?

EDIT

Following remarks on comments, I created a service:

services:
    my.user.repository:
        class:   MyBundle\Entity\UserRepository
        factory: ['@doctrine.orm.default_entity_manager', getRepository]
        arguments:
          - MyBundle\Entity\User

So now, I "just" have to mock the repo:

$userRepositoryMock = $this->getMockBuilder('MyBundle\Entity\UserRepository')
            ->disableOriginalConstructor()
            ->setMethods(['findAllOrderedByName'])
            ->getMock();

        $userRepositoryMock
            ->expects($this->once())
            ->method('findAllOrderedByName')
            ->will($this->returnValue($arrayOfUsers));

and inject it into the container:

$client->getContainer()->set('my.user.repository', $userRepositoryMock);

But I still have the same issue