NUnit 4 Framework

NUnit 4 Framework 4.6.1

A unit-testing framework for all .NET languages. It can be used for a wide range of testing, from unit testing with TDD to full fledged system and integration testing.

  • By NUnit
  • Open Source
  • Portable
  • Updated May 19, 2026
Download for Windows

About NUnit 4 Framework

A unit-testing framework for all .NET languages. It can be used for a wide range of testing, from unit testing with TDD to full fledged system and integration testing.

Note that due to the Winget package on x64 needing at least one .NET dependency for its x64 .exe-s to pass validation, the Winget package's x64 version automatically installs the .NET 8 Runtime, regardless of whether or not the user solely intends to use the .NET 6 or 4 .exe-s. The PATH shortcut will also lead to the .NET 8 .exe by default.

This can optionally be avoided by installing the designated x86 version with "-a x86", as the .NET 4 .exe used for x86 validation is not known to need a dependency. The PATH shortcut will however lead to the .NET 4 .exe by default.

In either situation, a functional x64 .exe for .NET 6 is furthermore also in the package.

What's new in 4.6.1

See release notes for details.

Full release notes »

Technical details

PublisherNUnit
Version4.6.1
Release date2026-05-19
LicenseMIT
Installer typezip
Architecturex86
Package IDNUnit.NUnit

Install NUnit 4 Framework from the command line

Install with Windows Package Manager
winget install --id=NUnit.NUnit -e
Update to the latest version
winget upgrade --id=NUnit.NUnit -e
Uninstall
winget uninstall --id=NUnit.NUnit -e

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NUnit 4 Framework version history

4.4.0 Aug 10, 2025

Frequently asked questions

Is NUnit 4 Framework free?

Yes. NUnit 4 Framework is free and open-source software released under the MIT license.

What is the latest version of NUnit 4 Framework?

The latest version is 4.6.1, released on May 19, 2026.

Is it safe to download NUnit 4 Framework?

The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 5f16b4a27c14c4cf5abb76d5e9433315d2f8fc26e5ea24e0559d80dd27422988.

Which Windows versions does NUnit 4 Framework support?

NUnit 4 Framework runs on Windows and is available for 32-bit (x86) systems.

How do I uninstall NUnit 4 Framework?

Open Settings › Apps › Installed apps, find NUnit 4 Framework and select Uninstall. From the command line, run winget uninstall --id=NUnit.NUnit -e.

Is there a portable version of NUnit 4 Framework?

Yes. NUnit 4 Framework is available as a portable ZIP archive (NUnit.Framework-4.6.1.zip, 32-bit (x86)) that runs without installation. Copy it to any folder or USB drive and run it from there.