Best Practices for Switching to a New Landing Page After A/B Testing

CRO QUESTION: If I send all my traffic for all my ads to a single LP, and I run a link redirect a/b test if the new LP wins, what is the protocol for making that the new LP permanently? Do I keep the A/B test running and switch it to 100% the new LP, or do I change the path of each of the pages so that the new LPs link becomes the original LPs link?