Rakefile

require 'rake'
require 'rspec/core/rake_task'

task :spec => 'test:spec'
task :test => 'test:all'
task :default => :spec

namespace :test do
 RSpec::Core::RakeTask.new(:spec) do |t|
 t.pattern = 'spec/*/*_spec.rb'
 end

 RSpec::Core::RakeTask.new(:exclude_slow) do |t|
 t.pattern = 'spec/*/*_spec.rb'
 t.rspec_opts = '--tag ~slow'
 end
end