avit/rspec-rails-caching — pull request #2 by joemsak (2013-07-04 19:04:07+00:00)
Title: Require rspec/core and use config.include Matchers to fix Rails env loading issue

I had the exact same issue described at thoughtbot/shoulda-matchers#259

https://github.com/thoughtbot/shoulda-matchers/issues/259