post to a different controller in an rspec test

How do I post to a different controller than the one the test script is currently pointing at?

Example: in user_controller_spec.rb

  it "should just post to users" do        
    post :create, @params    # this goes to the users controller
  end

I want to do something like:

  it "should post to user and people to do some integration testing" do        
    post :create, @params    # this goes to the users controller still
    post 'people', :create, @params   # this goes to the people controller
  end

ps: i don't want to setup cucumber