Hi! It's technically possible to test your localhost though it's a bit of work with ngrok. What we're seeing more and more of with our customers is they stand up ephemeral environments for each PR, or each merge, and then use Reflect's hostname and URL overrides at run time to target their code changes with the tests they already recorded against prod or staging. We've worked with Release W20 (https://releaseapp.io/) in the past to demonstrate running Reflect tests against each PR. I know it's not exactly what you're looking for, but similar in spirit, I think.