Integration testing Memes

The classic developer delusion: your code is invincible because it passed some pathetic little tests on your machine. Then reality hits when the CI pipeline runs and suddenly your precious code is getting absolutely demolished by tests in a different environment. It's the programming equivalent of practicing karate moves in your bedroom mirror vs. getting roundhouse kicked in an actual fight. "But it worked on MY machine" - the battle cry of the defeated developer since time immemorial.