Even a couple of hours of pairing per day is a huge team productivity boost though. Don't do it "all day every day".
It's OK to say "I'll go away for the afternoon to flesh out these tests as we have discussed".
I'll say that it's less about if the PR exists or not, but by the time it's raised it should be fine to merge it pretty much as soon as it's green, because people are on the same page before the code was even written.
Even a couple of hours of pairing per day is a huge team productivity boost though. Don't do it "all day every day".
It's OK to say "I'll go away for the afternoon to flesh out these tests as we have discussed".
I'll say that it's less about if the PR exists or not, but by the time it's raised it should be fine to merge it pretty much as soon as it's green, because people are on the same page before the code was even written.