diff --git a/activesupport/test/core_ext/duration_test.rb b/activesupport/test/core_ext/duration_test.rb
index 22950d8710..55b4df9f80 100644
--- a/activesupport/test/core_ext/duration_test.rb
+++ b/activesupport/test/core_ext/duration_test.rb
@@ -14,4 +14,8 @@ def test_inspect
   def test_minus_with_duration_does_not_break_subtraction_of_date_from_date
     assert_nothing_raised { Date.today - Date.today }
   end
+  
+  def test_plus_with_time
+    assert_equal 1 + 1.second, 1.second + 1, "Duration + Numeric should == Numeric + Duration"
+  end
 end