NUnit

NUnit
Original authorsCharlie Poole, James Newkirk, Alexei Vorontsov, Michael Two, Philip Craig, Rob Prouse, Simone Busoli, Neil Colvin
DevelopersThe NUnit Project,
.NET Foundation
Stable release
4.5.0 / 18 February 2026 (2026-02-18)
Written inC#
Operating system.NET, .NET Framework, Mono
TypeUnit testing tool
LicenseMIT License for 3.0, BSD-style (modified zlib license) for 2.x
Websitewww.nunit.org
Repositorygithub.com/nunit

NUnit is an open-source unit testing framework for .NET, .NET Framework, and Mono. It serves the same purpose as JUnit does in the Java world, and is one of many in the xUnit family.