capybara_sauce.rb

Capybara.register_driver :sauce do |app|
  Capybara::Selenium::Driver.new(
    app,
    browser: :remote,
    url: "http://#{ ENV['SAUCE_USER_NAME'] }:#{ ENV['SAUCE_API_KEY'] }@ondemand.saucelabs.com:80/wd/hub",
    desired_capabilities: { 'browserName' => ENV['SELENIUM_BROWSER'],
                            'version'     => ENV['SELENIUM_VERSION'],
                            'platform'    => ENV['SELENIUM_PLATFORM'] }
  )
end

Capybara.current_driver = :sauce
Capybara.javascript_driver = :sauce