For those trying to move projects to 0.7.0, but still using 0.6.4, RubyGems supports this arcane syntax for the bin stubs that allow you to specify a gem version: spec _0.6.4_ /path/to/your/specs And for the ruby on rails plugin, you can make "rake spec" work by add the following two lines to the top of tasks/rspec.rake file: require ''rubygems'' require_gem ''rspec'', ''0.6.4'' Hope that helps, Brandon