Sometimes it's necessary to override DI config not just for a whole test case, but for an individual test. In this case, provideContainerConfig() can be used, but it gets messy since you have to vary it's behavior based on the running test.

We could allow individual tests to override DI w/ a custom test annotation @provideContainerConfig, eg:

/**
 * @dataProvider getDataForTest
 * @provideContainerConfig getContainerConfigForThisTest
public function test_this_AndThat()
{
    // ...
}