ruby-on-rails - Clearance + Shoulda Matchers not loading on RSpec

Question

I added the following lines to my spec_helper.rb file

require 'clearance/testing'
require 'clearance/shoulda_macros'
config.include Clearance::Shoulda::Helpers

But I'm getting the following error:

~/.rvm/gems/ruby-1.8.7-p357/gems/activesupport-3.0.10/lib/active_support/dependencies.rb
:239:in `require': no such file to load -- clearance/shoulda_macros (LoadError)

Running Ruby 1.8.7, Rails 3.0.9 with the latest Shoulda, Clearance, and RSpec-rails gems installed.

Any ideas?