Testing fuelphp apps besides phpunit

I often using fuelphp, and testing with phpunit.

It started up to me as like, "Does any tools are able to test fuelphp apps?".

Fuelphp support phpunit. And I check sources of fuelphp, and the word 'phpunit' has been well-documented.

So , I think that it is difficult to use .

Does anyone know about it ?

Or, does anyone use another test tools with fuelphp ?