Force Google Recaptcha Challenge

The methods told here should generally work, but there is no guarantee of the same. There is a very easy way to guarantee that Google reCAPTCHA challenge always show up. All you need to do is to add a custom BOT device in developer tools and then use the same to test.

1. In Chrome Dev Tools, open Settings. Open Devices after that.
2. Add a custom device with any name and set User Agent String to Googlebot/2.1
3. Finally, in Device Mode, at the left of the top bar, choose the custom device that you created (the default is Responsive).

Thanks to the SO users who had put it up in the answer and follow-up comment here.