Hello symfony's team,

I'm experiencing an issue with Symfony 3.2.4. I want to implement functionnal tests by following this documentation: http://symfony.com/doc/current/best_practices/tests.html

When I run the test with the following command:
phpunit tests/AppBundle

I got an error:
Class 'PHPUnit_Framework_TestCase' not found

I'm using the latest stable PHPUnit version, installed as PHAR.

Is it a bug or did I missed something? I can't find further information about this issue.

Thank you a lot for your help.

Kind regards,
Fabien