bunyan‑gt is a small Node.js utility that lets you write end‑to‑end unit tests that verify a program’s behavior by parsing its structured JSON logs (produced with the Bunyan logger). It plugs into the QUnit‑style test runner **gt**, captures Bunyan output from a child process, and provides helpers to filter and assert on log messages, making automated testing of CLI tools and other applications that rely on structured logging simple and reliable.