diff --git a/activesupport/test/core_ext/object/inclusion_test.rb b/activesupport/test/core_ext/object/inclusion_test.rb
index 25120deb81..9f2ace0ef7 100644
--- a/activesupport/test/core_ext/object/inclusion_test.rb
+++ b/activesupport/test/core_ext/object/inclusion_test.rb
@@ -30,7 +30,7 @@ class InTest < Test::Unit::TestCase
     assert !3.in?(s)
   end
 
-  def test_either
+  def test_among
     assert 1.among?(1,2,3)
     assert !5.among?(1,2,3)
     assert [1,2,3].among?([1,2,3], 2, [3,4,5])