The MSBuildSettings extension UseToolVersion expects a valid value from the MSBuildToolVersion enumeration.

public static MSBuildSettings UseToolVersion(this MSBuildSettings settings, MSBuil

Xunit.Sdk.TraitHelper.GetTraits creates a new instance of Xunit.Sdk.NullMessageSink, a type that does not override Equals. That instance is later used as a part of the key for caching instance inside Xunit.Sdk.ExtensibilityPointFactory, resulting in caching not working for such calls at all.

Add support for the following combinations:

cut.FindAll(...).MarkupMatches(...);
cut.Find(...).MarkupMatches(cut.FindComponents<X>());