xunit, We just shipped v2 2.6.0, with a few new features and several bug fixes.
The most notable new feature is a new net6.0 build of xunit.assert which adds support for Span<>, Memory<>, ValueTask, ValueTask<>, ImmutableHashSet<>, and ImmutableDIctionary<>.
Release notes: https://xunit.net/releases/v2/2.6.0