Rails support folder. Do I have to include the module it in my test_helper or is it automatic?

I have this module written in my test/support folder.

module YourHelper
  def register_user(user)
    visit home_page
    fill_in 'user_name', :with => user.username
    fill_in 'password', :with => user.password
    click_button 'sign_up_button'
  end
end

Should I put it in my test/support folder or my test/helper folder?