C# Dev Kit And .NET Core Test Explorer can not see XUnit tests under 3.1 but can under 8.0
I’m using VSCode 1.92.2, C# Dev Kit v1.9.55 and .NET Core Test Explorer extension v0.7.8, however none of them can list my XUnit tests under .NET 3.1, but if I switch to project with .NET 8.0 all tests are enlisted just fine. Is .NET 3.1 no longer supported by these extensions?