diff --git a/test/parse/test_processing_instruction.rb b/test/parse/test_processing_instruction.rb
index 2273de64..49cf23a5 100644
--- a/test/parse/test_processing_instruction.rb
+++ b/test/parse/test_processing_instruction.rb
@@ -4,7 +4,7 @@
 require "rexml/document"
 
 module REXMLTests
-  class TestParseProcessinInstruction < Test::Unit::TestCase
+  class TestParseProcessingInstruction < Test::Unit::TestCase
     include Test::Unit::CoreAssertions
 
     def parse(xml)