Could you rewrite this test to describe the behaviour as observed by LB user - i.e. `Color` is available via REST, instead of describing the implementation details?

Something along these lines:

```js
app.use(loopback.rest());
request(app).get('/colors').expect(404, function(err, res) {
  if (err) return done(err);
  var Color = db.createModel('color', {name: String});
  app.model(Color);
  request(app).get('/colors').expect(200, done);
});
```