protected function fillTravisCi()
    {
        if (isset($this->env['TRAVIS']) && $this->env['TRAVIS'] && isset($this->env['TRAVIS_JOB_ID'])) {
            $this->env['CI_JOB_ID'] = $this->env['TRAVIS_JOB_ID'];

            if ($this->config->hasServiceName()) {
                $this->env['CI_NAME'] = $this->config->getServiceName();
            } else {
                $this->env['CI_NAME'] = 'travis-ci';
            }

            // backup
            $this->readEnv['TRAVIS'] = $this->env['TRAVIS'];
            $this->readEnv['TRAVIS_JOB_ID'] = $this->env['TRAVIS_JOB_ID'];
            $this->readEnv['CI_NAME'] = $this->env['CI_NAME'];
        }

        return $this;
    }