There's two situations here: You're being paid to write aviation quality code and the manager is incompetent about how to go about achieving that quality, or t

There's two situations here: You're being paid to write aviation quality code and the manager is incompetent about how to go about achieving that quality, or the manager is incompetent. Also, just parse the requirements, she's asking for confidence that it won't break any features, not that the commit won't actually break any features. Just be more confident. Seriously though, find a new job.