rspec
RSpec tasks on Rails 3
Problem: uninitialized constant RSpec::Rake Solution: You are using Rails 3 (and RSpec 2), and trying to define a custom rake task with Spec::Rake::SpecTask.new Instead, do: RSpec::Core::RakeTask.new(:spec) do |t| ... and make sure to change: t.spec_files = FileList['spec/**/*_spec.rb'