| `BRU_IMAGE` | The Docker image used to run the [Bruno CLI](https://docs.usebruno.com/cli/overview.html). | `registry.hub.docker.com/library/node:latest` |
| `BRU_COLLECTIONS` | The matcher to select Bruno collection directory(ies) to run. | `bruno` |
| `BRU_BASE_URL` | Explicit base url environment to test.<br/>_Auto-evaluated by default ([see below chapter](#base-url-auto-evaluation))._ | _none_ (auto-evaluated) |
| `BRU_EXTRA_ARGS` | Bruno extra [run options](https://docs.usebruno.com/cli/overview.html#options) | _none_ |
| `REVIEW_ENABLED` | Set to `true` to enable Bruno tests on review environments (dynamic environments instantiated on development branches) | _none_ (disabled) |