7 files changed, 12 insertions, 21 deletions
diff --git a/activemodel/test/observing_test.rb b/activemodel/test/observing_test.rb
index 6e124de52f..34bf260d69 100644
--- a/activemodel/test/observing_test.rb
+++ b/activemodel/test/observing_test.rb
@@ -1,4 +1,4 @@
-require File.expand_path(File.join(File.dirname(__FILE__), 'test_helper'))
+require 'test_helper'
 
 class ObservedModel < ActiveModel::Base
   class Observer
@@ -120,4 +120,4 @@ class ObserverTest < ActiveModel::TestCase
     Foo.send(:changed)
     Foo.send(:notify_observers, :whatever, foo)
   end
-end
-\ No newline at end of file
+end
diff --git a/activemodel/test/state_machine/event_test.rb b/activemodel/test/state_machine/event_test.rb
index 40b630da7c..7f4a9afdd8 100644
--- a/activemodel/test/state_machine/event_test.rb
+++ b/activemodel/test/state_machine/event_test.rb
@@ -1,4 +1,4 @@
-require File.expand_path(File.join(File.dirname(__FILE__), '..', 'test_helper'))
+require 'test_helper'
 
 class EventTest < ActiveModel::TestCase
   def setup
diff --git a/activemodel/test/state_machine/machine_test.rb b/activemodel/test/state_machine/machine_test.rb
index 2cdfcd9554..d23c223160 100644
--- a/activemodel/test/state_machine/machine_test.rb
+++ b/activemodel/test/state_machine/machine_test.rb
@@ -1,4 +1,4 @@
-require File.expand_path(File.join(File.dirname(__FILE__), '..', 'test_helper'))
+require 'test_helper'
 
 class MachineTestSubject
   include ActiveModel::StateMachine
@@ -40,4 +40,4 @@ class StateMachineMachineTest < ActiveModel::TestCase
     assert events.include?(:shutdown)
     assert events.include?(:timeout)
   end
-end
-\ No newline at end of file
+end
diff --git a/activemodel/test/state_machine/state_test.rb b/activemodel/test/state_machine/state_test.rb
index 22d0d9eb93..daaf0829f0 100644
--- a/activemodel/test/state_machine/state_test.rb
+++ b/activemodel/test/state_machine/state_test.rb
@@ -1,4 +1,4 @@
-require File.expand_path(File.join(File.dirname(__FILE__), '..', 'test_helper'))
+require 'test_helper'
 
 class StateTestSubject
   include ActiveModel::StateMachine
@@ -71,4 +71,4 @@ class StateTest < ActiveModel::TestCase
       state.call_action(:entering, record)
     end
   end
-end
-\ No newline at end of file
+end
diff --git a/activemodel/test/state_machine/state_transition_test.rb b/activemodel/test/state_machine/state_transition_test.rb
index 9a9e7f60c5..5165bb1c97 100644
--- a/activemodel/test/state_machine/state_transition_test.rb
+++ b/activemodel/test/state_machine/state_transition_test.rb
@@ -1,4 +1,4 @@
-require File.expand_path(File.join(File.dirname(__FILE__), '..', 'test_helper'))
+require 'test_helper'
 
 class StateTransitionTest < ActiveModel::TestCase
   test 'should set from, to, and opts attr readers' do
diff --git a/activemodel/test/state_machine_test.rb b/activemodel/test/state_machine_test.rb
index b2f0fc4ec0..fb150671e0 100644
--- a/activemodel/test/state_machine_test.rb
+++ b/activemodel/test/state_machine_test.rb
@@ -1,4 +1,4 @@
-require File.expand_path(File.join(File.dirname(__FILE__), 'test_helper'))
+require 'test_helper'
 
 class StateMachineSubject
   include ActiveModel::StateMachine
@@ -321,4 +321,4 @@ class StateMachineWithComplexTransitionsTest < ActiveModel::TestCase
       @subj.dress!(:dating, 'purple', 'slacks')
     end
   end
-end
-\ No newline at end of file
+end
diff --git a/activemodel/test/test_helper.rb b/activemodel/test/test_helper.rb
index ccf93280ec..6c10925270 100644
--- a/activemodel/test/test_helper.rb
+++ b/activemodel/test/test_helper.rb
@@ -1,10 +1,6 @@
-$:.unshift "#{File.dirname(__FILE__)}/../lib"
-$:.unshift File.dirname(__FILE__)
-
 require 'test/unit'
 require 'active_model'
 require 'active_model/state_machine'
-require 'active_support/callbacks' # needed by ActiveModel::TestCase
 require 'active_support/test_case'
 
 def uses_gem(gem_name, test_name, version = '> 0')
@@ -30,10 +26,5 @@ begin
 rescue LoadError
 end
 
-ActiveSupport::TestCase.send :include, ActiveSupport::Testing::Default
-
-module ActiveModel
-  class TestCase < ActiveSupport::TestCase
-    include ActiveSupport::Testing::Default
-  end
-end
-\ No newline at end of file
+class ActiveModel::TestCase < ActiveSupport::TestCase
+end