ServerRequest withAttribute / getParam fail in 3.6

gistfile1.php

<?php
namespace Admin\Test\TestCase\View\Cell;

use Admin\View\Cell\MenuCell;
use Cake\TestSuite\TestCase;

/**
 * Admin\View\Cell\MenuCell Test Case
 */
class MenuCellTest extends TestCase
{

    /**
     * Request mock
     *
     * @var \Cake\Http\ServerRequest|\PHPUnit_Framework_MockObject_MockObject
     */
    public $request;

    /**
     * Response mock
     *
     * @var \Cake\Http\Response|\PHPUnit_Framework_MockObject_MockObject
     */
    public $response;

    /**
     * Test subject
     *
     * @var \Admin\View\Cell\MenuCell
     */
    public $MenuCell;

    /**
     * setUp method
     *
     * @return void
     */
    public function setUp()
    {
        parent::setUp();
        $this->request = $this->getMockBuilder('Cake\Http\ServerRequest')->getMock();
        //$this->request = $this->request->withAttribute('params', ['controller' => 'Users']);
        $this->request = $this->request->withParam('controller', 'Users');
        debug($this->request->getParam('controller'));
    }

    /**
     * tearDown method
     *
     * @return void
     */
    public function tearDown()
    {
        unset($this->MenuCell);

        parent::tearDown();
    }

    public function testBadge()
    {
        $this->markTestIncomplete('Not implemented yet.');
    }
}