xUnit.net

Spec sheet

Purpose

xUnit.net is a free, open-source, community-focused unit testing tool for C#, F#, and Visual Basic.Read 4 Oct 2026 · xunit.net

Founded

2006Read 28 Sep 2026 · xunit.net

Analyzers

xUnit.net analyzers provide code analysis and code fixes for common issues encountered by test authors and extensibility authors.Read 4 Oct 2026 · xunit.net

Community policy

The project’s Code of Conduct states that it does not accept contributions made using LLMs.Read 4 Oct 2026 · xunit.net

Languages

The project templates support C#, F#, and Visual Basic.Read 4 Oct 2026 · xunit.net

License and governance

xUnit.net is licensed under Apache 2, is part of the .NET Foundation, and is governed by a Project Lead.Read 4 Oct 2026 · xunit.net

Native AOT

The documentation describes Native AOT support for native xUnit.net runners, Microsoft Testing Platform v2 runners, and VSTest.Read 4 Oct 2026 · xunit.net

Parallel tests

xUnit.net supports running tests in parallel, with v3 4.0 adding an all-tests parallel mode.Read 4 Oct 2026 · xunit.net

Runtime support

xUnit.net v3 supports .NET 8.0 or later and .NET Framework 4.7.2 or later.Read 4 Oct 2026 · xunit.net

Shared test context

Class fixtures share one object across tests in a class, and v3 adds assembly fixtures shared across test classes.Read 4 Oct 2026 · xunit.net

Standalone projects

xUnit.net v3 test projects are standalone executables that can run directly.Read 4 Oct 2026 · xunit.net

Telemetry

Starting with v3 build 3.2.0, NuGet packages include Microsoft.Testing.Extensions.Telemetry, and metrics collection can be disabled with TESTINGPLATFORM_TELEMETRY_OPTOUT=1.Read 4 Oct 2026 · xunit.net

Test runners

xUnit.net works with the .NET SDK command-line tools, Visual Studio, Visual Studio Code, JetBrains Rider, NCrunch, Microsoft.Testing.Platform, and VSTest-compatible environments.Read 4 Oct 2026 · xunit.net

Test styles

The framework supports facts for invariant conditions and theories that run against specified data.Read 4 Oct 2026 · xunit.net

v2 status

Core Framework v2 is in maintenance mode, with critical bug fixes but no new feature work; new features are developed for v3.Read 4 Oct 2026 · xunit.net

Plans and prices

Every xUnit.net plan and price →

Where Specifiction places it

• Unit Testing#21 of 327.4
• Unit Testing Frameworks#27 of 327.4