Error on test_unit with `rails generate`

Hi,

First, great job with the new version of guacamole and the new README/website!
I have a little error on using _rails generate_:

```
rails g collection troll
    create  app/collections/troll_collection.rb
     error  test_unit [not found]
```
The error appear when using rails generate (on collection or model) but don't do anything weird (files are generated correctly, or maybe some tests not).

**Note:** I use singular word because I wanted to test if my collection name will be pluralize like other generate methods in rails (or with the active record methods). 
And apparently it's not the case (new enhancement?).

**[update]** with the _rails generate model_ command the collection are pluralize, but not with _rails generate collection_
**[update 2]** _rails generate model_ with a plural name is not singularized for model name