public function after(TestEvent $e)
    {
        $seconds_input = $e->getTime();
        // stack overflow: http://stackoverflow.com/questions/16825240/how-to-convert-microtime-to-hhmmssuu
        $seconds = (int)($milliseconds = (int)($seconds_input * 1000)) / 1000;
        $time = ($seconds % 60) . (($milliseconds === 0) ? '' : '.' . $milliseconds);

        $this->write(Descriptor::getTestSignature($e->getTest()));
        $this->writeln(' (' . $time . 's)');
    }