7 Testing Myths Every Developer Should STOP Believing

Seven common testing myths are debunked with practical guidance for modern software engineering. Key points include: testers and developers should collaborate rather than be adversarial; developers must care about all pipeline tests, not just unit tests; acceptance tests should be a team effort, not dictated by a single product owner; 'isolation' in unit testing means isolating test runs and change batches, not just mocking dependencies; a 'unit' should be a slice of behavior, not a code structure; code coverage targets are counterproductive and should be a byproduct of good practices like TDD; and TDD is not always better — prototyping, spiking, and legacy code regression testing are valid exceptions.