Riot helpers don't memoize?

riot_helper_memoize

require 'teststrap'

context 'an array'do

  topic { Array.new }

  # Works as expected
  context 'when adding an object using manual memoize' do
    helper(my_object) { @my_object ||= Object.new }
    hookup { topic << my_object }
    
    asserts(:first).equals my_object
  end

  # Fails
  context 'when adding via basic helper' do
    helper(my_object) { Object.new }
    hookup { topic << my_object }
    
    asserts(:first).equals my_object
  end
end