# @sinonjs/referee > Assertions for any JavaScript test framework and environment Latest version **11.0.2** (published 2026-04-11) · BSD-3-Clause license · 0 weekly downloads ## Install ```sh npm install @sinonjs/referee pnpm add @sinonjs/referee yarn add @sinonjs/referee bun add @sinonjs/referee ``` ## Health **Score 45/100 (D)** — status: stable. Positive: no vulnerabilities. Warnings: low downloads; no types; no esm support. ## Facts | | | |---|---| | Version | 11.0.2 | | Published | 2026-04-11 | | First published | 2018-03-03 | | Weekly downloads | 0 | | License | BSD-3-Clause | | TypeScript types | none | | Module format | CommonJS | | Dependencies | 5 | | Unpacked size | 339.1 KB | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 43 | | Author | Christian Johansen | | Maintainers | mrgnrdrck, fatso83, mantoni, cjohansen, benjamin.gruenbaum, simenb | ## Links - npm: https://www.npmjs.com/package/@sinonjs/referee - Repository: https://github.com/sinonjs/referee - Homepage: https://github.com/sinonjs/referee#readme - Issues: https://github.com/sinonjs/referee/issues - npm.io page: https://npm.io/package/@sinonjs/referee ## Dependencies (5) - [util](https://npm.io/package/util.md) ^0.12.5 - [event-emitter](https://npm.io/package/event-emitter.md) ^0.3.5 - [@sinonjs/samsam](https://npm.io/package/@sinonjs/samsam.md) ^8.0.0 - [@sinonjs/commons](https://npm.io/package/@sinonjs/commons.md) ^3.0.0 - [lodash.isarguments](https://npm.io/package/lodash.isarguments.md) ^3.1.0 ## Recent versions - 11.0.2 (latest) — 2026-04-11 - 11.0.1 — 2024-02-10 - 11.0.0 — 2023-12-27 - 10.0.1 — 2023-06-29 - 10.0.0 — 2023-01-24 - 9.1.2 — 2022-11-07 - 9.1.1 — 2021-08-05 - 9.1.0 — 2021-07-26 - 9.0.1 — 2021-06-15 - 9.0.0 — 2021-06-08 - 8.0.2 — 2021-04-27 - 8.0.1 — 2021-04-08 - 8.0.0 — 2021-03-12 - 7.0.0 — 2020-11-16 - 6.2.1 — 2020-11-11 - … 25 more at https://npm.io/package/@sinonjs/referee/versions ## README # referee [![codecov](https://codecov.io/gh/sinonjs/referee/branch/main/graph/badge.svg)](https://codecov.io/gh/sinonjs/referee) Contributor Covenant **referee** is in your unit tests, deciding who passes and who fails. It is a test-framework agnostic assertion and expectation library, designed to work with your choice of test runner. Some highlights: - Rich library of assertions - Supports custom assertions - Complementary `assert/refute` (`refute` is referee's `assert.not`) - Evented: Emits success and failure events - Failing assertions throw exceptions by default, but can be configured to not - API to add custom assertions that provides quite a bit of plumbing for free - 100% test coverage (enforced with `test-check-coverage` in `package.json`) **referee** works in browsers (including old and rowdy ones, like IE11) and Node ([LTS versions](https://github.com/nodejs/Release#release-schedule)). It will define itself as an AMD module if you want it to (i.e. if there's a `define` function available). ## Documentation https://sinonjs.github.io/referee/ ## Backers Support us with a monthly donation and help us continue our activities. [[Become a backer](https://opencollective.com/sinon#backer)] ## Sponsors Become a sponsor and get your logo on our README on GitHub with a link to your site. [[Become a sponsor](https://opencollective.com/sinon#sponsor)] ## Licence referee was released under [BSD-3](LICENSE) --- _Source: https://npm.io/package/@sinonjs/referee · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._