---
title: 'Use ->not to reverse an assertion in @pestphp '
tweet_id: '1454133816990240773'
thread_slug: weekly-thread-2021-44
author_username: enunomaduro
images:
    - 'https://pbs.twimg.com/media/FCtnhAvXEAco-Kc.jpg'
created_at: 2021-10-29T17:11:33+00:00
slug: use-not-to-reverse-an-assertion-in-at-pestphp
---
Pest reminder: if you know how to test something, "not()" lets you test its opposite. ✅

https://pestphp.com/docs/expectations#expect-not