capybara selenium webdriver stripe.js checkout test helper

pay_stripe_helper.rb

# -*- encoding : utf-8 -*-
module PayStripeHelpers
  # must be used with driver: :selenium (or :sauce?)
  def pay_stripe
    sleep(0.7) # wait for the js to create the popup in response to pressing the button
    within_frame 'stripe_checkout_app' do # must be selenium
      # fill_in 'card_number', with: '4242424242424242' no longer works
      4.times {page.driver.browser.find_element(:id, 'card_number').send_keys('4242')}

      # fill_in 'cc-exp', with: '5/2018' no longer works
      page.driver.browser.find_element(:id, 'cc-exp').send_keys '5'
      page.driver.browser.find_element(:id, 'cc-exp').send_keys '18'

      page.driver.browser.find_element(:id, 'cc-csc').send_keys '123'
      find('button[type="submit"]').click
    end
    # wait for stripe to finish and change the page; default is 2 seconds
    find("body[data-tests-page='member/dashboard']", wait: 30)
  end
end

if respond_to?(:World) #cucumber
  World(PayStripeHelpers) 
else
  RSpec.configure do |config|
    config.include PayStripeHelpers, :type => :feature
  end
end

Was wondering if there was any update to this for Stripe's Payment Element? Have been struggling to get this to work with the new way. Oddly, I can get it to work within a pry, but not when it runs by itself.