We have bird slots like: Canary, Eagle, Owl etc. When there is a PR according to its order it gets deployed to one of them. Then we have preflight.com UI tests

We have bird slots like: Canary, Eagle, Owl etc. When there is a PR according to its order it gets deployed to one of them. Then we have preflight.com UI tests that run on those environments. Would love to tell you my experience.