1 files changed, 6 insertions, 1 deletions
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index b059bc3e89..1ee9fbf46e 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -624,10 +624,15 @@ class HashExtTest < ActiveSupport::TestCase
       { :failure => "stuff", :funny => "business" }.assert_valid_keys(:failure, :funny)
     end
 
-    assert_raise(ArgumentError, "Unknown key: failore") do
+    exception = assert_raise ArgumentError do
       { :failore => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])
+    end
+    assert_equal "Unknown key: :failore. Valid keys are: :failure, :funny", exception.message
+
+    exception = assert_raise ArgumentError do
       { :failore => "stuff", :funny => "business" }.assert_valid_keys(:failure, :funny)
     end
+    assert_equal "Unknown key: :failore. Valid keys are: :failure, :funny", exception.message
   end
 
   def test_assorted_keys_not_stringified