--- a/test/test_blankslate.rb
+++ b/test/test_blankslate.rb
@@ -10,8 +10,8 @@
 # above copyright notice is included.
 #++
 
-require 'helper'
-require 'preload'
+require_relative 'helper'
+require_relative 'preload'
 require 'blankslate'
 require 'stringio'
 
--- a/test/test_eventbuilder.rb
+++ b/test/test_eventbuilder.rb
@@ -10,8 +10,8 @@
 # above copyright notice is included.
 #++
 
-require 'helper'
-require 'preload'
+require_relative 'helper'
+require_relative 'preload'
 require 'builder'
 require 'builder/xmlevents'
 
--- a/test/test_namecollision.rb
+++ b/test/test_namecollision.rb
@@ -10,7 +10,7 @@
 # above copyright notice is included.
 #++
 
-require 'helper'
+require_relative 'helper'
 require 'builder/xchar'
 
 class TestNameCollisions < Builder::Test
--- a/test/test_xchar.rb
+++ b/test/test_xchar.rb
@@ -13,7 +13,7 @@
 
 #!/usr/bin/env ruby
 
-require 'helper'
+require_relative 'helper'
 require 'builder/xchar'
 
 if String.method_defined?(:encode)
--- a/test/test_markupbuilder.rb
+++ b/test/test_markupbuilder.rb
@@ -10,8 +10,8 @@
 # above copyright notice is included.
 #++
 
-require 'helper'
-require 'preload'
+require_relative 'helper'
+require_relative 'preload'
 require 'builder'
 require 'builder/xmlmarkup'
 
