protected function startWorkers(): void
    {
        $wrapper = realpath(__DIR__ . '/../../../bin/phpunit-sqlite-wrapper');

        for ($i = 1; $i <= $this->options->processes; ++$i) {
            $worker = new SqliteWorker($this->dbFileName);
            if ($this->options->noTestTokens) {
                $token = null;
                $uniqueToken = null;
            } else {
                $token = $i;
                $uniqueToken = uniqid();
            }
            $worker->start($wrapper, $token, $uniqueToken);
            $this->workers[] = $worker;
        }
    }