The tests are all running on 0.7.4. In installed 0.7.5 as follows: - sudo gem install rspec - script/plugin install svn://rubyforge.org/var/svn/rspec/tags/ REL_0_7_5_/vendor/rspec_on_rails/vendor/plugins/rspec - script/generate rspec ZenTest (3.4.1) is also installed. Here is what happens when I run the same tests that ran on 0.7.4. (By the way, Rails is build 5065). Any help is appreciated. $ rake spec (in /Users/minime/rails/voodoo_work) /opt/local/bin/ruby -I"/opt/local/lib/ruby/gems/1.8/gems/rspec-0.7.5/ lib" "/opt/local/lib/ruby/gems/1.8/gems/rspec-0.7.5/bin/spec" "spec/ models/cart_spec.rb" /Users/minime/rails/voodoo_work/config/../vendor/rails/activerecord/ lib/../../activesupport/lib/active_support/dependencies.rb:349:in `const_missing'': uninitialized constant Spec::RailsPlugin::ResponseBody::TagExpectations (NameError) from /Users/minime/rails/voodoo_work/vendor/plugins/vendor/ plugins/rspec/lib/spec/rails_plugin/response_body.rb:4 from /opt/local/lib/ruby/site_ruby/1.8/rubygems/ custom_require.rb:27:in `gem_original_require'' from /opt/local/lib/ruby/site_ruby/1.8/rubygems/ custom_require.rb:27:in `require'' from /Users/minime/rails/voodoo_work/config/../vendor/rails/ activerecord/lib/../../activesupport/lib/active_support/ dependencies.rb:364:in `require'' from /Users/minime/rails/voodoo_work/config/../vendor/ plugins/vendor/plugins/rspec/lib/rspec_on_rails.rb:16 from /opt/local/lib/ruby/site_ruby/1.8/rubygems/ custom_require.rb:27:in `gem_original_require'' from /opt/local/lib/ruby/site_ruby/1.8/rubygems/ custom_require.rb:27:in `require'' from /Users/minime/rails/voodoo_work/config/../vendor/rails/ activerecord/lib/../../activesupport/lib/active_support/ dependencies.rb:364:in `require'' from ./spec/models/../spec_helper.rb:3 from ./spec/models/cart_spec.rb:1:in `require'' from ./spec/models/cart_spec.rb:1 from /opt/local/lib/ruby/gems/1.8/gems/rspec-0.7.5/lib/spec/ runner/command_line.rb:21:in `load'' from /opt/local/lib/ruby/gems/1.8/gems/rspec-0.7.5/lib/spec/ runner/command_line.rb:21:in `run'' from /opt/local/lib/ruby/gems/1.8/gems/rspec-0.7.5/lib/spec/ runner/command_line.rb:15:in `each'' from /opt/local/lib/ruby/gems/1.8/gems/rspec-0.7.5/lib/spec/ runner/command_line.rb:15:in `run'' from /opt/local/lib/ruby/gems/1.8/gems/rspec-0.7.5/bin/spec:4