AWS adding custom load balancer rule for a single rest endpoint

Is there a way to configure a specific rule for AWS load balancer to one rest endpoint? We are developing a new version of our project, it implies changes for one endpoint rest, so we would like to put into production environment and only test this single endpoint. It means, all request should be redirected to old project except for the single endpoint. The request to the single endpoint should be balanced between the newer and older endpoint. Is it possible?