phpUnit Debug Technics Guzzle

$body = json_decode($response->getBody());

 fwrite(STDERR, json_encode($json));
 fwrite(STDERR, $body->message);

 public function testSuccesssfulJobCancel()
{

    $this->postOrderSuccesful();

    $headers = [
        'Authorization' => QATemplate::$deleteKey,
    ];
    $url = '/v1/jobId/M111111123-001';

    $response = QATemplate::$http->request(
        'DELETE',
        $url,
        [
            'verify' =>false,
            'http_errors' => false,
            'headers' =>$headers
        ]
    );

    $body = json_decode($response->getBody());

    fwrite(STDERR, json_encode($json));
    fwrite(STDERR, $body->message);


    $this->assertEquals(200, $response->getStatusCode());
    $this->assertContains("Success Job Deleted", $body->message);
}