1 files changed, 2 insertions, 2 deletions
diff --git a/activesupport/test/core_ext/string_ext_test.rb b/activesupport/test/core_ext/string_ext_test.rb
index b086c957fe..e232bf8384 100644
--- a/activesupport/test/core_ext/string_ext_test.rb
+++ b/activesupport/test/core_ext/string_ext_test.rb
@@ -207,7 +207,7 @@ class StringBehaviourTest < Test::Unit::TestCase
   end
 end
 
-class CoreExtStringMultibyteTest < Test::Unit::TestCase
+class CoreExtStringMultibyteTest < ActiveSupport::TestCase
   UNICODE_STRING = 'こにちわ'
   ASCII_STRING = 'ohayo'
   BYTE_STRING = "\270\236\010\210\245"
@@ -253,4 +253,4 @@ class CoreExtStringMultibyteTest < Test::Unit::TestCase
       assert UNICODE_STRING.mb_chars.kind_of?(String)
     end
   end
-end
-\ No newline at end of file
+end