Visual Studio adapter 4.0.1 2026 October 9

Today, we're shipping three new releases:

• xUnit.net Core Framework v3 4.0.2 (release notes)
• xUnit.net Analyzers 2.2.0 (release notes)
• xUnit.net Visual Studio adapter 4.0.1

It's been 8 weeks since the release of 4.0.0.

As always, we'd like to thank all the users who contributed to the success of xUnit.net through usage, feedback, and code. 🎉

Release Notes

These release notes are a comprehensive list of changes from 4.0.0 to 4.0.1.

Features and Fixes

• BUG: We fixed an issue where using a small multiplier for maximum threads could cause the multiplication to end up as 0, causing unlimited threads. This has been fixed to ensure the multiplier will always result in at least one thread, so there is always thread limiting when using a multiplier. xunit/xunit#3628