Capybara driver swapping on RSpec with SwingerSwinger is not maintained anymore, since its functionality is built into Capybara. Check out Capybara ate Swinger for more information. If you’ve been doing the acceptance testing dance for a while, you probably know it can get slow pretty fast. Not necessarily in every driver, but since you wanted awesome javascript stuff in your application you’ve equipped Capybara with Selenium to actually run
