The return vars from testAction are null unless I explicitly call $this->render() in my Controller

The return vars from testAction are null unless I explicitly call $this->render() in my Controller.

    public function testAddGet()
    {

        $this->testAction('/clients/add',
            array(
            'method' => 'GET',
            'return' => 'contents',
        ));

        $this->assertRegExp('/<html/', $this->contents);
        $this->assertRegExp('/<form/', $this->view);
    }

$this->view is null, and $this->contents is null.

I am using Cake 2.5.4 and php 5.4.34

What is annoying about this is that this has worked previously. I do not recall what version of PHP previously (most likely 5.3), but this test case used to PASS.

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