A surprisingly good workflow improvement will be to run tests on master + your feature branch, and then have a bot push to master. No humans need to be involved

A surprisingly good workflow improvement will be to run tests on master + your feature branch, and then have a bot push to master. No humans need to be involved in the final steps. This way master can be always green, because build errors will crop up in branches - only once the tests pass and review is complete, the bot can push to master. Because builds are generally done from master, this prevents landing broken code that could break others' development flow. The end result is that all build failures have been addressed in the development branches. Bot will refuse to merge code that fails tests - and the workflow itself will guide towards a desirable process.