---
title: "enforce-unique"
description: "A helper for ensuring generated values remain unique."
pagination: false
---

{/* Generated from content/. Edit the catalog, not this page. */}

<PurposeNote title="Good for">Avoiding duplicate fixture values while creating test data.</PurposeNote>

## What it does

A helper for ensuring generated values remain unique.

## When it fits

Avoiding duplicate fixture values while creating test data.

## Other options in this category

<div data-pagefind-ignore>

- [@msw/playwright](/testing/msw-playwright) — Controlling network responses during browser-level application tests.
- [@mswjs/data](/testing/mswjs-data) — Building a stateful mocked backend for application test scenarios.
- [Argos](/testing/argos) — Detecting interface changes by comparing screenshots in development workflows.
- [Faker](/testing/faker) — Creating sample users, records, and large development datasets.
- [Falso](/testing/falso) — Creating typed fixtures such as names, addresses, and product details.

</div>

## Source

[Project source for enforce-unique ↗](https://www.npmjs.com/package/enforce-unique)

Editorial overview reviewed on October 24, 2026. Follow the source for current setup, compatibility, and licensing.

[Test a user workflow →](/tasks/test-a-user-workflow)

[All testing &amp; mock data options →](/testing)