The button that toggles between sorting by outcome vs sorting by module name is a bit odd

[ovatsus]

My first reaction was to think it was a expand all / collapse all

I suggest you make it a dropdown like the VS test explorer, where for now you put those two options but then can add more (like by project as requested in #4)

[Krzysztof-Cieslak]

Again, due to limitations of VSCode API I can't put dropdown there, unfortunately :(

However, I do agree that the current icon is bit confusing.