Add I18n translations to rspec tests

In my code, a Rails 3 project, using RSpec 2, that is exactly the line I write:

describe "GET 'index'" do
  before do
    get 'index'
  end
  it "should be successful" do
    response.should be_redirect
  end

  it "should show appropriate flash" do
    flash[:warning].should == I18n.t('authorisation.not_authorized')
  end
end

So I am not sure why you say it is not possible?