Test project for an issue I have with mocking time in symfony 2.8

I did a clean install of new project, using composer:

composer create-project symfony/framework-standard-edition symfony-phpunit-bridge-clockmock "2.8.*"

Then I added 2 unittests in the DefaultControllerTest: one which explicitly enables the ClockMock, and one with the @group time-sensitive annotation:

$ phpunit -c app/ --filter explicit
PHPUnit 5.1.3 by Sebastian Bergmann and contributors.
.                                                                   1 / 1 (100%)
Time: 24 ms, Memory: 4.00Mb
OK (1 test, 1 assertion)

So, the explicit test works: it does a sleep(5), but finishes in 24ms.

However:

$ phpunit -c app/ --filter annotation
PHPUnit 5.1.3 by Sebastian Bergmann and contributors.
.                                                                   1 / 1 (100%)
Time: 5.02 seconds, Memory: 4.00Mb
OK (1 test, 1 assertion)

So, the test using the @group annotation actually takes 5 seconds, meaning the ClockMock didn't work.

There's nothing wrong with the @group annotation itself:

$ phpunit -c app/ --group time-sensitive
PHPUnit 5.1.3 by Sebastian Bergmann and contributors.
.                                                                   1 / 1 (100%)
Time: 5.02 seconds, Memory: 4.00Mb
OK (1 test, 1 assertion)