Guardfile

gistfile1.rb

guard 'spork', :rspec_env => { 'RAILS_ENV' => 'test' }, :cucumber => false do
  watch('config/application.rb')
  watch('config/environment.rb')
  watch(%r{^config/environments/.+\.rb$})
  watch(%r{^config/initializers/.+\.rb$})
  watch('spec/spec_helper.rb')
end

guard 'rspec', :cli => '--drb' do
  watch(%r{^spec/.+_spec\.rb})
  watch(%r{^app/(.+)\.rb})                           { |m| "spec/#{m[1]}_spec.rb" }
  watch(%r{^lib/(.+)\.rb})                           { |m| "spec/lib/#{m[1]}_spec.rb" }
  watch(%r{^app/controllers/(.+)_(controller)\.rb})  { |m| "spec/requests/#{m[1]}_spec.rb" }
  watch(%r{^app/views/(.+)/.*\.erb})                 { |m| "spec/requests/#{m[1]}_spec.rb" }
end

caveats: fixtures will blow up. Hard.

agora que vi meu nome aqui =~