diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index ebc2a4651ba..bd4ba384b29 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -24,7 +24,7 @@ class ApplicationController < ActionController::Base
 
   protect_from_forgery with: :exception
 
-  helper_method :abilities, :can?, :current_application_settings
+  helper_method :can?, :current_application_settings
   helper_method :import_sources_enabled?, :github_import_enabled?, :github_import_configured?, :gitlab_import_enabled?, :gitlab_import_configured?, :bitbucket_import_enabled?, :bitbucket_import_configured?, :google_code_import_enabled?, :fogbugz_import_enabled?, :git_import_enabled?, :gitlab_project_import_enabled?
 
   rescue_from Encoding::CompatibilityError do |exception|
@@ -97,12 +97,8 @@ class ApplicationController < ActionController::Base
     current_application_settings.after_sign_out_path.presence || new_user_session_path
   end
 
-  def abilities
-    Ability.abilities
-  end
-
   def can?(object, action, subject)
-    abilities.allowed?(object, action, subject)
+    Ability.allowed?(object, action, subject)
   end
 
   def access_denied!
diff --git a/app/finders/issuable_finder.rb b/app/finders/issuable_finder.rb
index 33daac0399e..60996b181f2 100644
--- a/app/finders/issuable_finder.rb
+++ b/app/finders/issuable_finder.rb
@@ -64,7 +64,7 @@ class IssuableFinder
     if project?
       @project = Project.find(params[:project_id])
 
-      unless Ability.abilities.allowed?(current_user, :read_project, @project)
+      unless Ability.allowed?(current_user, :read_project, @project)
         @project = nil
       end
     else
diff --git a/app/finders/todos_finder.rb b/app/finders/todos_finder.rb
index 06b3e8a9502..a93a63bdb9b 100644
--- a/app/finders/todos_finder.rb
+++ b/app/finders/todos_finder.rb
@@ -83,7 +83,7 @@ class TodosFinder
     if project?
       @project = Project.find(params[:project_id])
 
-      unless Ability.abilities.allowed?(current_user, :read_project, @project)
+      unless Ability.allowed?(current_user, :read_project, @project)
         @project = nil
       end
     else
diff --git a/app/mailers/base_mailer.rb b/app/mailers/base_mailer.rb
index 8b83bbd93b7..61a574d3dc0 100644
--- a/app/mailers/base_mailer.rb
+++ b/app/mailers/base_mailer.rb
@@ -9,7 +9,7 @@ class BaseMailer < ActionMailer::Base
   default reply_to: Proc.new { default_reply_to_address.format }
 
   def can?
-    Ability.abilities.allowed?(current_user, action, subject)
+    Ability.allowed?(current_user, action, subject)
   end
 
   private
diff --git a/app/models/ability.rb b/app/models/ability.rb
index 3eb8a5f6e03..891c5ba9276 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -592,11 +592,6 @@ class Ability
       [:read_user]
     end
 
-    def abilities
-      warn 'Ability.abilities is deprecated, use Ability.allowed?(user, action, subject) instead'
-      self
-    end
-
     def restricted_public_level?
       current_application_settings.restricted_visibility_levels.include?(Gitlab::VisibilityLevel::PUBLIC)
     end
diff --git a/app/models/event.rb b/app/models/event.rb
index fd736d12359..a0b7b0dc2b5 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -65,7 +65,7 @@ class Event < ActiveRecord::Base
     elsif created_project?
       true
     elsif issue? || issue_note?
-      Ability.abilities.allowed?(user, :read_issue, note? ? note_target : target)
+      Ability.allowed?(user, :read_issue, note? ? note_target : target)
     else
       ((merge_request? || note?) && target.present?) || milestone?
     end
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 62163e74000..57d673a5f25 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -411,7 +411,7 @@ class MergeRequest < ActiveRecord::Base
   def can_remove_source_branch?(current_user)
     !source_project.protected_branch?(source_branch) &&
       !source_project.root_ref?(source_branch) &&
-      Ability.abilities.allowed?(current_user, :push_code, source_project) &&
+      Ability.allowed?(current_user, :push_code, source_project) &&
       diff_head_commit == source_branch_head
   end
 
diff --git a/app/models/user.rb b/app/models/user.rb
index ad3cfbc03e4..8f5958333d7 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -460,16 +460,12 @@ class User < ActiveRecord::Base
     can?(:create_group, nil)
   end
 
-  def abilities
-    Ability.abilities
-  end
-
   def can_select_namespace?
     several_namespaces? || admin
   end
 
   def can?(action, subject)
-    abilities.allowed?(self, action, subject)
+    Ability.allowed?(self, action, subject)
   end
 
   def first_name
diff --git a/app/services/base_service.rb b/app/services/base_service.rb
index 0d55ba5a981..0c208150fb8 100644
--- a/app/services/base_service.rb
+++ b/app/services/base_service.rb
@@ -7,12 +7,8 @@ class BaseService
     @project, @current_user, @params = project, user, params.dup
   end
 
-  def abilities
-    Ability.abilities
-  end
-
   def can?(object, action, subject)
-    abilities.allowed?(object, action, subject)
+    Ability.allowed?(object, action, subject)
   end
 
   def notification_service
diff --git a/lib/api/helpers.rb b/lib/api/helpers.rb
index 1afca5fe2e8..fdb70af694d 100644
--- a/lib/api/helpers.rb
+++ b/lib/api/helpers.rb
@@ -148,7 +148,7 @@ module API
     end
 
     def can?(object, action, subject)
-      abilities.allowed?(object, action, subject)
+      Ability.allowed?(object, action, subject)
     end
 
     # Checks the occurrences of required attributes, each attribute must be present in the params hash
@@ -408,10 +408,6 @@ module API
       links.join(', ')
     end
 
-    def abilities
-      Ability
-    end
-
     def secret_token
       File.read(Gitlab.config.gitlab_shell.secret_file).chomp
     end
diff --git a/lib/banzai/reference_parser/base_parser.rb b/lib/banzai/reference_parser/base_parser.rb
index 6cf218aaa0d..e8e03e4a98f 100644
--- a/lib/banzai/reference_parser/base_parser.rb
+++ b/lib/banzai/reference_parser/base_parser.rb
@@ -211,7 +211,7 @@ module Banzai
       end
 
       def can?(user, permission, subject)
-        Ability.abilities.allowed?(user, permission, subject)
+        Ability.allowed?(user, permission, subject)
       end
 
       def find_projects_for_hash_keys(hash)
diff --git a/spec/controllers/projects/boards/issues_controller_spec.rb b/spec/controllers/projects/boards/issues_controller_spec.rb
index d0ad5e26dbd..2896636db5a 100644
--- a/spec/controllers/projects/boards/issues_controller_spec.rb
+++ b/spec/controllers/projects/boards/issues_controller_spec.rb
@@ -41,8 +41,8 @@ describe Projects::Boards::IssuesController do
 
     context 'with unauthorized user' do
       before do
-        allow(Ability.abilities).to receive(:allowed?).with(user, :read_project, project).and_return(true)
-        allow(Ability.abilities).to receive(:allowed?).with(user, :read_issue, project).and_return(false)
+        allow(Ability).to receive(:allowed?).with(user, :read_project, project).and_return(true)
+        allow(Ability).to receive(:allowed?).with(user, :read_issue, project).and_return(false)
       end
 
       it 'returns a successful 403 response' do
diff --git a/spec/controllers/projects/boards/lists_controller_spec.rb b/spec/controllers/projects/boards/lists_controller_spec.rb
index 9496636e3cc..af0491bf486 100644
--- a/spec/controllers/projects/boards/lists_controller_spec.rb
+++ b/spec/controllers/projects/boards/lists_controller_spec.rb
@@ -35,8 +35,8 @@ describe Projects::Boards::ListsController do
 
     context 'with unauthorized user' do
       before do
-        allow(Ability.abilities).to receive(:allowed?).with(user, :read_project, project).and_return(true)
-        allow(Ability.abilities).to receive(:allowed?).with(user, :read_list, project).and_return(false)
+        allow(Ability).to receive(:allowed?).with(user, :read_project, project).and_return(true)
+        allow(Ability).to receive(:allowed?).with(user, :read_list, project).and_return(false)
       end
 
       it 'returns a successful 403 response' do
diff --git a/spec/controllers/projects/boards_controller_spec.rb b/spec/controllers/projects/boards_controller_spec.rb
index 75a6d39e82c..6f6e608e1f3 100644
--- a/spec/controllers/projects/boards_controller_spec.rb
+++ b/spec/controllers/projects/boards_controller_spec.rb
@@ -23,8 +23,8 @@ describe Projects::BoardsController do
 
     context 'with unauthorized user' do
       before do
-        allow(Ability.abilities).to receive(:allowed?).with(user, :read_project, project).and_return(true)
-        allow(Ability.abilities).to receive(:allowed?).with(user, :read_board, project).and_return(false)
+        allow(Ability).to receive(:allowed?).with(user, :read_project, project).and_return(true)
+        allow(Ability).to receive(:allowed?).with(user, :read_board, project).and_return(false)
       end
 
       it 'returns a successful 404 response' do
diff --git a/spec/lib/banzai/reference_parser/base_parser_spec.rb b/spec/lib/banzai/reference_parser/base_parser_spec.rb
index ac9c66e2663..9095d2b1345 100644
--- a/spec/lib/banzai/reference_parser/base_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/base_parser_spec.rb
@@ -30,7 +30,7 @@ describe Banzai::ReferenceParser::BaseParser, lib: true do
       it 'returns the nodes if the attribute value equals the current project ID' do
         link['data-project'] = project.id.to_s
 
-        expect(Ability.abilities).not_to receive(:allowed?)
+        expect(Ability).not_to receive(:allowed?)
         expect(subject.nodes_visible_to_user(user, [link])).to eq([link])
       end
 
@@ -39,7 +39,7 @@ describe Banzai::ReferenceParser::BaseParser, lib: true do
 
         link['data-project'] = other_project.id.to_s
 
-        expect(Ability.abilities).to receive(:allowed?).
+        expect(Ability).to receive(:allowed?).
           with(user, :read_project, other_project).
           and_return(true)
 
@@ -57,7 +57,7 @@ describe Banzai::ReferenceParser::BaseParser, lib: true do
 
         link['data-project'] = other_project.id.to_s
 
-        expect(Ability.abilities).to receive(:allowed?).
+        expect(Ability).to receive(:allowed?).
           with(user, :read_project, other_project).
           and_return(false)
 
@@ -221,7 +221,7 @@ describe Banzai::ReferenceParser::BaseParser, lib: true do
     it 'delegates the permissions check to the Ability class' do
       user = double(:user)
 
-      expect(Ability.abilities).to receive(:allowed?).
+      expect(Ability).to receive(:allowed?).
         with(user, :read_project, project)
 
       subject.can?(user, :read_project, project)
diff --git a/spec/lib/banzai/reference_parser/user_parser_spec.rb b/spec/lib/banzai/reference_parser/user_parser_spec.rb
index 9a82891297d..4e7f82a6e09 100644
--- a/spec/lib/banzai/reference_parser/user_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/user_parser_spec.rb
@@ -82,7 +82,7 @@ describe Banzai::ReferenceParser::UserParser, lib: true do
         end
 
         it 'returns the nodes if the user can read the group' do
-          expect(Ability.abilities).to receive(:allowed?).
+          expect(Ability).to receive(:allowed?).
             with(user, :read_group, group).
             and_return(true)
 
@@ -90,7 +90,7 @@ describe Banzai::ReferenceParser::UserParser, lib: true do
         end
 
         it 'returns an empty Array if the user can not read the group' do
-          expect(Ability.abilities).to receive(:allowed?).
+          expect(Ability).to receive(:allowed?).
             with(user, :read_group, group).
             and_return(false)
 
@@ -103,7 +103,7 @@ describe Banzai::ReferenceParser::UserParser, lib: true do
           it 'returns the nodes if the attribute value equals the current project ID' do
             link['data-project'] = project.id.to_s
 
-            expect(Ability.abilities).not_to receive(:allowed?)
+            expect(Ability).not_to receive(:allowed?)
 
             expect(subject.nodes_visible_to_user(user, [link])).to eq([link])
           end
@@ -113,7 +113,7 @@ describe Banzai::ReferenceParser::UserParser, lib: true do
 
             link['data-project'] = other_project.id.to_s
 
-            expect(Ability.abilities).to receive(:allowed?).
+            expect(Ability).to receive(:allowed?).
               with(user, :read_project, other_project).
               and_return(true)
 
@@ -125,7 +125,7 @@ describe Banzai::ReferenceParser::UserParser, lib: true do
 
             link['data-project'] = other_project.id.to_s
 
-            expect(Ability.abilities).to receive(:allowed?).
+            expect(Ability).to receive(:allowed?).
               with(user, :read_project, other_project).
               and_return(false)
 
diff --git a/spec/models/members/project_member_spec.rb b/spec/models/members/project_member_spec.rb
index c2bf48da44e..be57957b569 100644
--- a/spec/models/members/project_member_spec.rb
+++ b/spec/models/members/project_member_spec.rb
@@ -71,8 +71,6 @@ describe ProjectMember, models: true do
 
   describe :import_team do
     before do
-      @abilities = Ability
-
       @project_1 = create :project
       @project_2 = create :project
 
@@ -91,8 +89,8 @@ describe ProjectMember, models: true do
       it { expect(@project_2.users).to include(@user_1) }
       it { expect(@project_2.users).to include(@user_2) }
 
-      it { expect(@abilities.allowed?(@user_1, :create_project, @project_2)).to be_truthy }
-      it { expect(@abilities.allowed?(@user_2, :read_project, @project_2)).to be_truthy }
+      it { expect(Ability.allowed?(@user_1, :create_project, @project_2)).to be_truthy }
+      it { expect(Ability.allowed?(@user_2, :read_project, @project_2)).to be_truthy }
     end
 
     describe 'project 1 should not be changed' do
diff --git a/spec/models/note_spec.rb b/spec/models/note_spec.rb
index f4b9fa270e4..e6b6e7c0634 100644
--- a/spec/models/note_spec.rb
+++ b/spec/models/note_spec.rb
@@ -85,7 +85,6 @@ describe Note, models: true do
       @u1 = create(:user)
       @u2 = create(:user)
       @u3 = create(:user)
-      @abilities = Ability
     end
 
     describe 'read' do
@@ -94,9 +93,9 @@ describe Note, models: true do
         @p2.project_members.create(user: @u3, access_level: ProjectMember::GUEST)
       end
 
-      it { expect(@abilities.allowed?(@u1, :read_note, @p1)).to be_falsey }
-      it { expect(@abilities.allowed?(@u2, :read_note, @p1)).to be_truthy }
-      it { expect(@abilities.allowed?(@u3, :read_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u1, :read_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u2, :read_note, @p1)).to be_truthy }
+      it { expect(Ability.allowed?(@u3, :read_note, @p1)).to be_falsey }
     end
 
     describe 'write' do
@@ -105,9 +104,9 @@ describe Note, models: true do
         @p2.project_members.create(user: @u3, access_level: ProjectMember::DEVELOPER)
       end
 
-      it { expect(@abilities.allowed?(@u1, :create_note, @p1)).to be_falsey }
-      it { expect(@abilities.allowed?(@u2, :create_note, @p1)).to be_truthy }
-      it { expect(@abilities.allowed?(@u3, :create_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u1, :create_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u2, :create_note, @p1)).to be_truthy }
+      it { expect(Ability.allowed?(@u3, :create_note, @p1)).to be_falsey }
     end
 
     describe 'admin' do
@@ -117,9 +116,9 @@ describe Note, models: true do
         @p2.project_members.create(user: @u3, access_level: ProjectMember::MASTER)
       end
 
-      it { expect(@abilities.allowed?(@u1, :admin_note, @p1)).to be_falsey }
-      it { expect(@abilities.allowed?(@u2, :admin_note, @p1)).to be_truthy }
-      it { expect(@abilities.allowed?(@u3, :admin_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u1, :admin_note, @p1)).to be_falsey }
+      it { expect(Ability.allowed?(@u2, :admin_note, @p1)).to be_truthy }
+      it { expect(Ability.allowed?(@u3, :admin_note, @p1)).to be_falsey }
     end
   end