diff --git a/activeresource/test/cases/format_test.rb b/activeresource/test/cases/format_test.rb
index c3733e13d87f5..bed95ef5248ed 100644
--- a/activeresource/test/cases/format_test.rb
+++ b/activeresource/test/cases/format_test.rb
@@ -33,7 +33,7 @@ def test_formats_on_collection
         ActiveResource::HttpMock.respond_to.get "/people.#{format}", {'Accept' => ActiveResource::Formats[format].mime_type}, ActiveResource::Formats[format].encode(@programmers)
         remote_programmers = Person.find(:all)
         assert_equal 2, remote_programmers.size
-        assert remote_programmers.select { |p| p.name == 'David' }
+        assert remote_programmers.map { |p| p.name }.include? 'David'
       end
     end
   end