diff --git a/test/plugin/test_in_tail.rb b/test/plugin/test_in_tail.rb
index 4391a67371..6edb9f38d6 100644
--- a/test/plugin/test_in_tail.rb
+++ b/test/plugin/test_in_tail.rb
@@ -3,12 +3,12 @@
 require 'fluent/plugin/in_tail'
 require 'fluent/plugin/buffer'
 require 'fluent/system_config'
+require 'fluent/file_wrapper'
 require 'net/http'
 require 'flexmock/test_unit'
 require 'timecop'
 require 'tmpdir'
 require 'securerandom'
-require 'file_wrapper'
 
 class TailInputTest < Test::Unit::TestCase
   include FlexMock::TestCase