diff --git a/spec/fake_app.rb b/spec/fake_app.rb
index ed77345e5..38a21f548 100644
--- a/spec/fake_app.rb
+++ b/spec/fake_app.rb
@@ -53,6 +53,9 @@ class Book < ActiveRecord::Base
   has_many :authors, :through => :authorships, :source => :user
   has_many :readers, :through => :readerships, :source => :user
 end
+# a model that is a descendant of AR::Base but doesn't directly inherit AR::Base
+class Admin < User
+end
 
 # controllers
 class ApplicationController < ActionController::Base; end
diff --git a/spec/models/scopes_spec.rb b/spec/models/scopes_spec.rb
index 28e70ef5d..9052f616c 100644
--- a/spec/models/scopes_spec.rb
+++ b/spec/models/scopes_spec.rb
@@ -10,12 +10,13 @@
 end
 
 describe Kaminari::ActiveRecordExtension do
-  [User, GemDefinedModel].each do |model_class|
-    context "for #{model_class}" do
-      before :all do
-        1.upto(100) {|i| model_class.create! :name => "user#{'%03d' % i}", :age => (i / 10)}
-      end
+  before :all do
+    1.upto(100) {|i| User.create! :name => "user#{'%03d' % i}", :age => (i / 10)}
+    1.upto(100) {|i| GemDefinedModel.create! :name => "user#{'%03d' % i}", :age => (i / 10)}
+  end
 
+  [User, Admin, GemDefinedModel].each do |model_class|
+    context "for #{model_class}" do
       describe '#page' do
         context 'page 1' do
           subject { model_class.page 1 }