yes, so I use `require('mocha').reporters` to get reporters from [reporters/index.js](https://github.com/visionmedia/mocha/blob/master/lib/reporters/index.js), it should work on Linux. I tried it on travis-ci.

https://github.com/yurenju/gaia/commit/6e94236191dde65a8e4b7d9b32693ac191e2edf2
https://travis-ci.org/yurenju/gaia/builds/14792372