We are running xunit.net based tests using dotnet test via the command-line.
I stumbled now upon several configuration options for xunit that do not have the same amount of settings:
Why are there not all settings available in both versions? When to use which flavor?
.runsettings is a standardized way of configuring unit tests being run by VSTest or MSTest runners. xunit.runner.json is xUnit's own configuration alternative. Use whichever is most suitable to your setup.