diff --git a/ChangeLog b/ChangeLog
index 445d4443f3..5f03b37d62 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jun 13 18:53:14 2013  Tanaka Akira  <akr@fsij.org>
+
+	* test/ruby/test_thread.rb (test_thread_local_security): Don't create
+	  an unused thread.
+
 Thu Jun 13 18:34:20 2013  Tanaka Akira  <akr@fsij.org>
 
 	* bignum.c (bigdivrem): Use nlz.
diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb
index 46831f3c46..6f33a120f7 100644
--- a/test/ruby/test_thread.rb
+++ b/test/ruby/test_thread.rb
@@ -382,8 +382,6 @@ class TestThread < Test::Unit::TestCase
   end
 
   def test_thread_local_security
-    t = Thread.new { sleep }
-
     assert_raise(RuntimeError) do
       Thread.new do
         Thread.current[:foo] = :bar