public function iRunPhpspec($argumentsString = '')
    {
        $argumentsString = strtr($argumentsString, array('\'' => '"'));

        $this->process->setWorkingDirectory($this->workingDir);
        $this->process->setCommandLine(
            sprintf(
                '%s %s %s --no-interaction',
                $this->phpBin,
                escapeshellarg($this->getPhpspecBinPath()),
                $argumentsString
            )
        );
        $this->process->start();
        $this->process->wait();
    }