```ruby
require File.join(File.dirname(__FILE__), '..', 'spec_helper')
$db = Mongo::Connection.new.db('dm-mongo-test')
include DataMapper::Mongo
```

Fix old spec helper path so as to require the new helper only once.
user
```ruby
require File.expand_path(File.join(File.dirname(__FILE__), '..', 'spec_helper'))
$db = Mongo::Connection.new.db('dm-mongo-test')
include DataMapper::Mongo
```
assistant