Front End Testing using Elixir

#question
I’m bring this post back to life to ask the following question. Is it possible to use Wallaby or Hound to test external sites, outside of ExUnit?

##Context:
I want to build a Front End QA tooling that has a set of endpoints for me to utilize from another website. Essentially I want to utilize the QA tool from website A to test website A. I understand this seem unnecessary, but I feel that this would be a good way for me to introduce Elixir to your company without impacting business logic.