diff --git a/ChangeLog b/ChangeLog
index 26509650b6..5d7b694049 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Sep  3 11:33:08 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* test/openssl/test_pkey_rsa.rb (OpenSSL#test_sign_verify_memory_leak):
+	  added timeout into testcase for low performance environment.
+	  [Bug #9984][ruby-core:63367]
+
 Wed Sep  3 07:50:15 2014  Tanaka Akira  <akr@fsij.org>
 
 	* configure.in: Use AC_FUNC_FORK.
diff --git a/test/openssl/test_pkey_rsa.rb b/test/openssl/test_pkey_rsa.rb
index ce9bd60c2f..df0c6090cb 100644
--- a/test/openssl/test_pkey_rsa.rb
+++ b/test/openssl/test_pkey_rsa.rb
@@ -77,7 +77,7 @@ class OpenSSL::TestPKeyRSA < Test::Unit::TestCase
 
   def test_sign_verify_memory_leak
     bug9743 = '[ruby-core:62038] [Bug #9743]'
-    assert_no_memory_leak(%w[-ropenssl], <<-PREP, <<-CODE, bug9743, rss: true)
+    assert_no_memory_leak(%w[-ropenssl], <<-PREP, <<-CODE, bug9743, rss: true, timeout: 30)
     data = 'Sign me!'
     digest = OpenSSL::Digest::SHA512.new
     pkey = OpenSSL::PKey::RSA.new(2048)
@@ -89,7 +89,7 @@ class OpenSSL::TestPKeyRSA < Test::Unit::TestCase
     }
     CODE
 
-    assert_no_memory_leak(%w[-ropenssl], <<-PREP, <<-CODE, bug9743, rss: true)
+    assert_no_memory_leak(%w[-ropenssl], <<-PREP, <<-CODE, bug9743, rss: true, timeout: 30)
     data = 'Sign me!'
     digest = OpenSSL::Digest::SHA512.new
     pkey = OpenSSL::PKey::RSA.new(2048)