PhpSpec seems to be stopping through test suite

I am just starting to use PhpSpec and I seem to be running into an issue

I am testing this function

public function response(array $errors)
{
    return $this->errorForbidden($errors);
}

public function errorForbidden($message = 'Forbidden')
{
     return $this->setStatusCode(403)->respondWithError($message);
}

When I run this test

function it_checks_errors_returns_array_of_errors()
{
    $error = ["This is an error" => "Error time!"];

    $this->response($error)->shouldBeCalled();
}

it just stops half way through, see the image:

http://cl.ly/image/0K2v2r0d290l

Where as I should see something like this:

http://cl.ly/image/2X1G1e1T2N1q

There must be a simple reason why this is happening I just don't know it