RSpec.configure do |config|
  [...]
  require 'capybara/webkit'
  require 'headless'
  Capybara.javascript_driver = :webkit
end

Capybara::Webkit.configure do |config|
  # config.debug = true

  # Timeout if requests take longer than 5 seconds
  config.timeout = 5

  # Don't load images
  config.skip_image_loading
end

config.around(:each, js: true) do |example|
  Headless.ly do
    example.run
  end
end