You can also simplify things like `requestParams` by using `request.post`. From my helper:
```js
request.post(_.template('https://saucelabs.com/rest/v1/${user}/js-tests', this), {
  'auth': { 'user': this.user, 'pass': this.pass },
  'json': this.options
}, _.bind(onJobStart, this));
```