Code Quality Rank: L3
Monthly Downloads: 687,393
Programming language: C#
License: Copyright (c) 2017 Charlie Poole
Tags: Framework     Test     Testing     TDD     Assert     NUnit     Fluent     Theory     Plugin     Addin    
Latest version: v3.12

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NUnit 3 Framework

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NUnit is a unit-testing framework for all .NET languages. Initially ported from JUnit, the current production release, version 3, has been completely rewritten with many new features and support for a wide range of .NET platforms.

Table of Contents


The latest stable release of the NUnit Framework is available on NuGet or can be downloaded from GitHub. Pre-release builds are available on MyGet.


Documentation for all NUnit projects are hosted on GitHub at https://github.com/nunit/docs/wiki.


For more information on contributing to the NUnit project, please see CONTRIBUTING.md and the Developer Docs.

NUnit 3.0 was created by Charlie Poole, Rob Prouse, Simone Busoli, Neil Colvin and numerous community contributors. A complete list of contributors since NUnit migrated to GitHub can be found on GitHub.

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

Debugger source-stepping

The NUnit and NUnitLite NuGet packages contain a source-indexed PDB for each binary from this repository. If you’re in the middle of a debugging session and realize you’d like to be able to step into NUnit code, set breakpoints and watch variables, follow these steps.


NUnit is Open Source software and NUnit 3 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.

NUnit Projects

NUnit is made up of several projects. When reporting issues, please try to report issues in the correct project.

Core Projects

  • NUnit Test Framework - The test framework used to write NUnit tests (this repository)
  • NUnit Console and Engine - Runs unit tests from the command line and provides the engine that is used by other test runners to run NUnit tests

Visual Studio Extensions

Other Projects

NUnit Engine Extensions

*Note that all licence references and agreements mentioned in the NUnit README section above are relevant to that project's source code only.