Hi, this is happening because you are probably using PHPUnit 6 which no longer supports PHPUnit_Framework_TestCase and has been replace by PHPUnit\Framework\TestCase. See https://thephp.cc/news/2017/02/migrating-to-phpunit-6 for more information.

Hi @theofidry,

That was it! Now everything works as expected.

Thank you a lot 👍 I'm closing this issue.

Regards,
Fabien

@fabienlem Thanks for reporting your issue anyway. We will update the documentation in symfony/symfony-docs#7556 to reflect these changes in PHPUnit.

@xabbuh don't spend too much time on this. Next releases (in all branches) will be compatible with PHPUnit 6

@stof I know. The docs PR just updates the examples to not use the old classes anymore (but use the namespaced classes instead).

This was helpful

// use the following namespace
use PHPUnit\Framework\TestCase;

// extend using TestCase instead PHPUnit_Framework_TestCase
class SampleTest extends TestCase {

}