---
title: Flux testing functions
description: Flux testing functions test piped-forward data in specific ways and return errors if the tests fail.
aliases:
  - /v2.0/reference/flux/functions/tests
menu:
  v2_0_ref:
    name: Tests
    parent: Built-in
    identifier: built-in-tests
weight: 305
---

Flux testing functions test piped-forward data in specific ways and return errors if the tests fail.
The following testing functions are available:

{{< children type="functions" >}}