That doesn't mean that in situations when you want to test nickname you can't pass it in.

``` ruby
user_without_nickname = Factory.build :user
user_without_nickname.nickname # => nil

user_with_nickname = Factory.build :user, nickname: 'Coop-d-oh-double-g' # lol
user_with_nickname.nickname # => 'Coop-d-oh-double-g'
```