diff --git a/app/models/notifications/mentioned_in_comment.rb b/app/models/notifications/mentioned_in_comment.rb
index 5b57f395b..35ef9b61a 100644
--- a/app/models/notifications/mentioned_in_comment.rb
+++ b/app/models/notifications/mentioned_in_comment.rb
@@ -11,7 +11,7 @@ module Notifications
     end
 
     def self.filter_mentions(mentions, mentionable, _recipient_user_ids)
-      mentions.includes(:person).merge(Person.allowed_to_be_mentioned_in_a_comment_to(mentionable.parent)).distinct
+      mentions.includes(:person).merge(Person.allowed_to_be_mentioned_in_a_comment_to(mentionable.parent))
     end
 
     def mail_job
diff --git a/app/models/person.rb b/app/models/person.rb
index e9eefc6ec..3da18333b 100644
--- a/app/models/person.rb
+++ b/app/models/person.rb
@@ -61,11 +61,7 @@ class Person < ActiveRecord::Base
   }
   scope :remote, -> { where('people.owner_id IS NULL') }
   scope :local, -> { where('people.owner_id IS NOT NULL') }
-  scope :for_json, -> {
-    select("people.id, people.guid, people.diaspora_handle")
-      .distinct
-      .includes(:profile)
-  }
+  scope :for_json, -> { select("people.id, people.guid, people.diaspora_handle").includes(:profile) }
 
   # @note user is passed in here defensively
   scope :all_from_aspects, ->(aspect_ids, user) {
@@ -131,12 +127,13 @@ class Person < ActiveRecord::Base
   # @param [Post] the post for which we query mentionable in comments people
   # @return [Person::ActiveRecord_Relation]
   scope :allowed_to_be_mentioned_in_a_comment_to, ->(post) {
-    if post.public?
-      all
-    else
-      left_join_visible_post_interactions_on_authorship(post.id)
-        .where("comments.id IS NOT NULL OR likes.id IS NOT NULL OR people.id = #{post.author_id}")
-    end
+    allowed = if post.public?
+                all
+              else
+                left_join_visible_post_interactions_on_authorship(post.id)
+                  .where("comments.id IS NOT NULL OR likes.id IS NOT NULL OR people.id = #{post.author_id}")
+              end
+    allowed.distinct
   }
 
   # This scope adds sorting of people in the order, appropriate for suggesting to a user (current user) who
diff --git a/spec/models/person_spec.rb b/spec/models/person_spec.rb
index 4e65c6ccc..9c54e98ee 100644
--- a/spec/models/person_spec.rb
+++ b/spec/models/person_spec.rb
@@ -24,16 +24,6 @@ describe Person, :type => :model do
           Person.for_json.first.serialized_public_key
         }.to raise_error ActiveModel::MissingAttributeError
       end
-
-      it 'selects distinct people' do
-        aspect = bob.aspects.create(:name => 'hilarious people')
-        aspect.contacts << bob.contact_for(eve.person)
-        person_ids = Person.for_json.joins(:contacts => :aspect_memberships).
-          where(:contacts => {:user_id => bob.id},
-               :aspect_memberships => {:aspect_id => bob.aspect_ids}).map{|p| p.id}
-
-        expect(person_ids.uniq).to eq(person_ids)
-      end
     end
 
     describe '.local' do
@@ -131,9 +121,17 @@ describe Person, :type => :model do
         ).to match_array([alice, bob, eve, kate].map(&:person_id))
       end
 
+      it "selects distinct people" do
+        alice.comment!(status_bob, "hyi")
+        alice.comment!(status_bob, "how are you?")
+        expect(
+          Person.allowed_to_be_mentioned_in_a_comment_to(status_bob).ids
+        ).to match_array([alice, bob].map(&:person_id))
+      end
+
       it "returns all for public posts" do
         status_bob.update(public: true) # set parent public
-        expect(Person.allowed_to_be_mentioned_in_a_comment_to(status_bob)).to eq(Person.all)
+        expect(Person.allowed_to_be_mentioned_in_a_comment_to(status_bob).ids).to match_array(Person.ids)
       end
     end