Thanks for your question on creating a testing site with PrestaShop. We actually have not done this with PrestaShop. It is the same through the first 7 steps, but after that, but after that it would be very different. I am not sure all of the files that would need changes. It may also need database changes via the back end before you are able to log into the Admin area to officially change the shop URL. We will need more testing and then will create an article on how to do that.

Kindest Regards,
Scott M