public function onConcurrentRunnerEnd($errors)
    {
        $this->output->writeln(sprintf(' Run time: %s', \PHP_Timer::secondsToTimeString($this->getTime())));
        $errorCount = count($errors);
        if (! $errorCount) {
            return;
        }

        $labels = ['was', 'error'];

        if ($errorCount > 1) {
            $labels = ['were', 'errors'];
        }

        $this->output->writeln('');
        $this->output->writeln($this->color('error', sprintf('There %s %d %s:', $labels[0], $errorCount, $labels[1])));
        $this->outputErrors($errors);
    }