With `ava@4.0.0-alpha.1` installed, running the `no-ignored-test-files` rule on any AVA test file causes `eslint` to hang indefinitely. With `ava@3.x`, or with `"no-ignored-test-files": "off"`, everything's fine. [Minimal reproducible example.](https://github.com/ninevra/ava-next-eslint-hangs-mre)