1 files changed, 2 insertions, 2 deletions
diff --git a/actionpack/test/controller/new_base/bare_metal_test.rb b/actionpack/test/controller/new_base/bare_metal_test.rb
index df4b39a103..8a06e8d2a0 100644
--- a/actionpack/test/controller/new_base/bare_metal_test.rb
+++ b/actionpack/test/controller/new_base/bare_metal_test.rb
@@ -18,10 +18,10 @@ module BareMetalTest
         string << part
       end
 
-      assert headers.is_a?(Hash), "Headers must be a Hash"
+      assert_kind_of Hash, headers, "Headers must be a Hash"
       assert headers["Content-Type"], "Content-Type must exist"
 
       assert_equal "Hello world", string
     end
   end
-end
-\ No newline at end of file
+end