How to have a RSS feed only for one Category

[hhlp]

I've read the jenkyll-feed and I've found this configuration but not works for me

atom_feed:   ---->       also testing feed:
  categories:
    - Blog
  tags: false

Refrerences: https://github.com/jekyll/jekyll-feed

Regards.,

[iBug]

The categories key inside feed key specifies additional feeds to generate. AFAIK there's no way to suppress the "default feed", so you might as well let it generate and then delete it in your build script.