... an excellent example of idiomatic design. Most folks who port xUnit just transliterate the Smalltalk or Java version. That's what we did with NUnit at first, too. This new version is NUnit as it would have been done had it been done in C# to begin with. Kent Beck

What Is NUnit?

NUnit is a unit-testing framework for all .Net languages. Initially ported from JUnit, the current production release, version 3.0, has been completely rewritten with many new features and support for a wide range of .NET platforms.


NUnit is Open Source software and NUnit 3.0 is released under the MIT license. . Earlier releases used the NUnit license Both of these licenses allow the use of NUnit in free and commercial applications and libraries without restrictions.

About Us

NUnit 3.0 was created by Charlie Poole, Rob Prouse, Simone Busoli, Neil Colvin and numerous community contributors.

Earlier versions of NUnit were developed by Charlie Poole, James W. Newkirk, Alexei A. Vorontsov, Michael C. Two and Philip A. Craig.


The NUnit team invests a great deal of time and effort to make NUnit a useful tool. In addition, we have expenses. We have to purchase domain names, arrange for web site hosting and acquire equipment.

Making a financial contribution is one way in which you can help us ensure that NUnit continues to develop and remains free and open software. For more information or to view a list of donors, see our Donations page.

Recent News

NUnit 3.6.1 Hotfix Release

This is a hotfix release of the framework that addresses critical issues found in the 3.6 release.

You may download NUnit 3.6.1 from Github. See the release notes for more information.

NUnit 3.6 Released

This release of the framework no longer includes builds for Compact Framework or for SilverLight, but adds a .NET Standard 1.6 build. If anyone still using Compact Framework or SilverLight and would like to continue development on those versions of the framework, please contact the NUnit team.

You may download NUnit 3.6 from Github. See the release notes for more information.

NUnit .NET Core Runner Beta 2 Released

We have released an NUnit runner for testing .NET Core projects.

For more information, see the NUnit 3 Test Runner for .NET Core GitHub repository.

NUnit 3 VS Adapter 3.4.1 Released
Fixes two critical issues in 3.4.0.

Available from the VS Gallery or on Nuget.org.

NUnit Templates Visual Studio Extension

We have released a new Visual Studio Extension that adds Project and Item templates along with Code Snippets to make unit testing with NUnit 3 easier.

Supports Visual Studio 2012 through 2015.

Available from the VS Gallery.

NUnit Xamarin Runners Released
Adds support for running NUnit 3.0 unit tests on Xamarin.

Supported platforms - Android, iOS, Windows Phone 8.1 and Window 10 Universal Apps.

Install the runners from NuGet or by searching for the package nunit.xamarin.

For more information, see the GitHub page.

NUnit 2.6.4 Released
This fixes a few bugs in NUnit 2.6.3 and adds checks to ensure that tests written for NUnit 3.0 are not erroneously executed. See the release notes for details of changes or Download it...