diff --git a/app/services/system_note_service.rb b/app/services/system_note_service.rb
index 898c69b3f8c..1dee791cfd6 100644
--- a/app/services/system_note_service.rb
+++ b/app/services/system_note_service.rb
@@ -84,7 +84,7 @@ module SystemNoteService
         "assigned to #{issue.assignees.map(&:to_reference).to_sentence}"
       end
 
-    create_note(noteable: issue, project: project, author: author, note: body)
+    NoteSummary.new(issue, project, author, body, action: 'assignee')
   end
 
   # Called when one or more labels on a Noteable are added and/or removed
diff --git a/spec/features/boards/sidebar_spec.rb b/spec/features/boards/sidebar_spec.rb
index 02b6b5dc888..7c53d2b47d9 100644
--- a/spec/features/boards/sidebar_spec.rb
+++ b/spec/features/boards/sidebar_spec.rb
@@ -21,7 +21,6 @@ describe 'Issue Boards', feature: true, js: true do
     Timecop.freeze
 
     project.team << [user, :master]
-    project.team.add_developer(user2)
 
     login_as(user)
 
@@ -103,26 +102,6 @@ describe 'Issue Boards', feature: true, js: true do
       expect(card).to have_selector('.avatar')
     end
 
-    it 'adds multiple assignees' do
-      click_card(card)
-
-      page.within('.assignee') do
-        click_link 'Edit'
-
-        wait_for_ajax
-
-        page.within('.dropdown-menu-user') do
-          click_link user.name
-          click_link user2.name
-        end
-
-        expect(page).to have_content(user.name)
-        expect(page).to have_content(user2.name)
-      end
-
-      expect(card.all('.avatar').length).to eq(2)
-    end
-
     it 'removes the assignee' do
       card_two = first('.board').find('.card:nth-child(2)')
       click_card(card_two)