volkswagen
Volkswagen detects when your tests are being run in a CI server
...It recognizes services such as Travis CI, CircleCI, Jenkins, GitLab CI, AppVeyor, Buildkite, and other systems exposing common CI variables. The package can affect tests that fail through thrown errors or nonzero exit codes. It works with testing libraries including assert, tap, tape, and Chai. The project is a programming joke and demonstration rather than a legitimate testing practice.