In my experience this depends a lot on the organizations. If the organization's expectation is that sometimes, no tests would be ok, then quickly these people e

In my experience this depends a lot on the organizations. If the organization's expectation is that sometimes, no tests would be ok, then quickly these people emerge who think that writing tests slows them down. If culture is that tests are necessary, then these people hide and write their tests (or actually learn that test-writing makes sense). I am in an organization currently that values testing overall, but being in a regulated industry its almost a little over-done, the result of that is, that for prototypes, tools, etc. the rules are weakened, leading to this weird situation where "of course we write tests, but this was just our prototype, that runs in production, for 3 years" seems to work in some departments...