How to add customs rspec tasks in Rails 3

custom_specs.rake

# Our goal is to be able to run spec:bricks along spec, when
# using the 'rake spec' command.
# In lib/tasks/custom_specs.rake, add:

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

namespace :spec do
  desc "Run bricks specs"
  RSpec::Core::RakeTask.new('bricks') do |spec|
    spec.pattern = 'storm-bricks/spec/**/*_spec.rb'
  end
end

Rake::Task[:spec].enhance do
  Rake::Task["spec:bricks"].invoke
end