diff --git a/test/simple_oauth_test.rb b/test/simple_oauth_test.rb
index a930743..ba15dcc 100644
--- a/test/simple_oauth_test.rb
+++ b/test/simple_oauth_test.rb
@@ -1,3 +1,4 @@
+# -*- encoding: utf-8 -*-
 require 'helper'
 
 class SimpleOAuthTest < Test::Unit::TestCase