Laravel - PHPUnit简单测试失败

I don't understand... Very first test phpunit works fine. Then I added new Route and new method of course.

Route::get( '/about', 'HomeController@about' );

So, I changed the line inside ExampleTest:

public function testBasicExample()
    {
        $response = $this->call('GET', '/about');

        $this->assertEquals(200, $response->getStatusCode());
    }

And this gives me an error: Failed asserting that 302 matches expected 200.

What I was doing wrong?

public function testBasicExample()
{
    $response = $this->call('GET', '/about')->response;

    $this->assertEquals(200, $response->status());
}