TestRunner / NUnit is probably something you don’t need. Unity still barfs tons of unnecessary stuff into new projects, so you might want to just take that stuff out. Here’s how:
Extra unwanted packages in new projects (collab, testing, rider and other junk):
About the fastest way I have found to make a project and avoid all this noise is to create the project, then as soon as you see the files appear, FORCE-STOP (hard-kill) Unity (with the Activity Manager or Task Manager), then go hand-edit the Packages/manifest.json file as outlined in the above post, then reopen Unity.
