[kcartlidge]

> Rebuilding the project to run the tests adds a bit of time, yes.

It costs money, but I've paid for NCrunch for a fair few years and find it invaluable for this reason. It doesn't even need you to save changes before it spots them and runs affected tests in the background.

If cost is an issue you can also start `dotnet watch test` going in a terminal/command prompt for non-interactive live-reload testing.