Currently in [`master`](https://github.com/puppetlabs/puppetlabs_spec_helper/blob/aea0102bd8a9e36b916fd2f04d0912085cac9abd/lib/puppetlabs_spec_helper/puppet_spec_helper.rb#L9) there is a require to this library. You can't require something that isn't listed as a dependency. I just made it explicit.