public function footer()
    {
        if ($this->failures) {
            $this->output->write($this->getCountString($this->failures, true));
            $this->output->write(',');
        }

        $this->output->write($this->getCountString($this->successes, false));
        $this->output->writeln(sprintf(' (%d total)', $this->failures + $this->successes));
    }