Deactivesupport

kaminari-core/lib/kaminari/models/configuration_methods.rb

@@ -1,7 +1,10 @@
 # frozen_string_literal: true
 module Kaminari
   module ConfigurationMethods #:nodoc:
-    extend ActiveSupport::Concern
+    def self.included(base)
+      base.extend ClassMethods
+    end
+
     module ClassMethods #:nodoc:
       # Overrides the default +per_page+ value per model
       #   class Article < ActiveRecord::Base

kaminari-core/test/fake_gem.rb

@@ -1,10 +1,8 @@
 # frozen_string_literal: true
 module Kaminari
   module FakeGem
-    extend ActiveSupport::Concern
-
-    module ClassMethods
-      def inherited(kls)
+    def self.included(base)
+      def base.inherited(kls)
         super
         def kls.fake_gem_defined_method; end
       end