5 files changed, 5 insertions, 4 deletions
diff --git a/test/optparse/test_getopts.rb b/test/optparse/test_getopts.rb
index fdefe5f3e5..1ba194ace1 100644
--- a/test/optparse/test_getopts.rb
+++ b/test/optparse/test_getopts.rb
@@ -1,4 +1,5 @@
 require 'test/unit'
+require 'optparse'
 
 class TestOptionParserGetopts < Test::Unit::TestCase
   def setup
diff --git a/test/optparse/test_noarg.rb b/test/optparse/test_noarg.rb
index 329956a61a..3e6ed42f91 100644
--- a/test/optparse/test_noarg.rb
+++ b/test/optparse/test_noarg.rb
@@ -1,4 +1,4 @@
-require 'test_optparse'
+require_relative 'test_optparse'
 
 module TestOptionParser::NoArg
   class Def1 < TestOptionParser
diff --git a/test/optparse/test_optarg.rb b/test/optparse/test_optarg.rb
index 49cb1b93ec..2058e3719d 100644
--- a/test/optparse/test_optarg.rb
+++ b/test/optparse/test_optarg.rb
@@ -1,4 +1,4 @@
-require 'test_optparse'
+require_relative 'test_optparse'
 
 class TestOptionParser::OptArg < TestOptionParser
   def setup
diff --git a/test/optparse/test_placearg.rb b/test/optparse/test_placearg.rb
index ea5810cbc5..1aec01efb4 100644
--- a/test/optparse/test_placearg.rb
+++ b/test/optparse/test_placearg.rb
@@ -1,4 +1,4 @@
-require 'test_optparse'
+require_relative 'test_optparse'
 
 class TestOptionParser::PlaceArg < TestOptionParser
   def setup
diff --git a/test/optparse/test_reqarg.rb b/test/optparse/test_reqarg.rb
index 579794695a..47c9e9a8a7 100644
--- a/test/optparse/test_reqarg.rb
+++ b/test/optparse/test_reqarg.rb
@@ -1,4 +1,4 @@
-require 'test_optparse'
+require_relative 'test_optparse'
 
 module TestOptionParser::ReqArg
   class Def1 < TestOptionParser