diff --git a/test/parse/test_character_reference.rb b/test/parse/test_character_reference.rb
index 4bb5da5c..bf2b1938 100644
--- a/test/parse/test_character_reference.rb
+++ b/test/parse/test_character_reference.rb
@@ -2,6 +2,7 @@
 require "core_assertions"
 
 require "rexml/document"
+require "rexml/parsers/pullparser"
 
 module REXMLTests
   class TestParseCharacterReference < Test::Unit::TestCase