1 files changed, 12 insertions, 1 deletions
diff --git a/activemodel/lib/active_model/test_case.rb b/activemodel/lib/active_model/test_case.rb
index 09fb6d707c..4cb5c9cbc0 100644
--- a/activemodel/lib/active_model/test_case.rb
+++ b/activemodel/lib/active_model/test_case.rb
@@ -2,6 +2,17 @@ require "active_support/test_case"
 
 module ActiveModel #:nodoc:
   class TestCase < ActiveSupport::TestCase #:nodoc:
-    include ActiveModel::ValidationsRepairHelper
+    def with_kcode(kcode)
+      if RUBY_VERSION < '1.9'
+        orig_kcode, $KCODE = $KCODE, kcode
+        begin
+          yield
+        ensure
+          $KCODE = orig_kcode
+        end
+      else
+        yield
+      end
+    end
   end
 end