diff --git a/actionpack/test/template/atom_feed_helper_test.rb b/actionpack/test/template/atom_feed_helper_test.rb
index 9247a42d33..06af8d1d6a 100644
--- a/actionpack/test/template/atom_feed_helper_test.rb
+++ b/actionpack/test/template/atom_feed_helper_test.rb
@@ -255,7 +255,8 @@ def test_feed_should_allow_overriding_ids
   def test_feed_xml_processing_instructions
     with_restful_routing(:scrolls) do
       get :index, :id => 'feed_with_xml_processing_instructions'
-      assert_match %r{<\?xml-stylesheet type="text/css" href="t.css"\?>}, @response.body
+      assert_match %r{<\?xml-stylesheet [^\?]*type="text/css"}, @response.body
+      assert_match %r{<\?xml-stylesheet [^\?]*href="t.css"}, @response.body
     end
   end