test: Improve test suite setup

spec/dummy/app/models/profile.rb

@@ -3,14 +3,12 @@
 class Profile < ApplicationRecord
   belongs_to :author, inverse_of: :profile, touch: true
 
-  # has_rich_text :description
-
-  # def to_s
-  #   description
-  # end
+  def to_s
+    description
+  end
 
   class << self
-    def ransackable_associations(auth_object = nil)
+    def ransackable_associations(_auth_object = nil)
       %w[author]
     end