diff --git a/test/ruby/test_alias.rb b/test/ruby/test_alias.rb
index 32aa92a8d9..cef39d690f 100644
--- a/test/ruby/test_alias.rb
+++ b/test/ruby/test_alias.rb
@@ -1,5 +1,5 @@
 require 'test/unit'
-require_relative 'envutils'
+require_relative 'envutil'
 
 class TestAlias < Test::Unit::TestCase
   class Alias0