code: public function paintMethodEnd($method)
      {
          if ($this->fail || $this->error || ! $this->pass) {
          } else {
              $this->listener->write(
                          '{status:"pass",message:"' . $this->message . '",group:"' .
                          $this->group . '",case:"' . $this->case . '",method:"' .
                          $this->method . '"}');
          }
      }
docs: Only send one message if the test passes, after that suppress the message.
  
  @param string $test_name   Name of test that is ending.