diff --git a/test/test_generic_spreadsheet.rb b/test/test_generic_spreadsheet.rb
index <HASH>..<HASH> 100644
--- a/test/test_generic_spreadsheet.rb
+++ b/test/test_generic_spreadsheet.rb
@@ -1,3 +1,4 @@
+# -*- encoding: utf-8 -*-
 require File.dirname(__FILE__) + '/test_helper.rb'
 
 class TestGenericSpreadsheet < Test::Unit::TestCase
add encoding comment to the top of this new file