An example of using switch_driver in a capybara spec

mobile_login.rb

require File.dirname(__FILE__) + '/../acceptance_helper'

feature "Logging in on mobile site", %q{
  In order to access my site on the go,
  As a user,
  I want to log into my site
} do

  switch_driver :mobile

  scenario "Successfully logging in" do
    # Your great spec here.
  end
end