rails controllers mini testing after pundit authorize put in controller

I have used pundit in authorization and have decorated my actions in the controller with authorize. I am using minitest/unit nor RSpec. Right after I applied the authorize key word in the actions, the testes started to fail with:

Expected response to be a <2xx: success> but, a <302: found> redirected to http://www.example.com/

a sample controller:

 index
  authorize User
 end

end any help?