diff --git a/actionpack/test/controller/test_test.rb b/actionpack/test/controller/test_test.rb
index e2f78ad30c..ec30f0ac8b 100644
--- a/actionpack/test/controller/test_test.rb
+++ b/actionpack/test/controller/test_test.rb
@@ -429,7 +429,7 @@ HTML
 
   def test_fixture_file_upload
     post :test_file_upload, :file => fixture_file_upload(FILES_DIR + "/mona_lisa.jpg", "image/jpg")
-    assert_equal 159528, @response.body
+    assert_equal '159528', @response.body
   end
 
   def test_test_uploaded_file_exception_when_file_doesnt_exist