2 files changed, 16 insertions, 0 deletions
diff --git a/test/thread/test_cv.rb b/test/thread/test_cv.rb
index 9a9b407a5b..92179e8e45 100644
--- a/test/thread/test_cv.rb
+++ b/test/thread/test_cv.rb
@@ -188,4 +188,12 @@ INPUT
 
     assert_nothing_raised(Exception) { mutex.synchronize {condvar.broadcast} }
   end
+
+  def test_dup
+    bug9440 = '[ruby-core:59961] [Bug #9440]'
+    condvar = ConditionVariable.new
+    assert_raise(NoMethodError, bug9440) do
+      condvar.dup
+    end
+  end
 end
diff --git a/test/thread/test_queue.rb b/test/thread/test_queue.rb
index bf8344fade..07a611ddd2 100644
--- a/test/thread/test_queue.rb
+++ b/test/thread/test_queue.rb
@@ -200,4 +200,12 @@ class TestQueue < Test::Unit::TestCase
       timeout(1) { th2.join }
     end
   end
+
+  def test_dup
+    bug9440 = '[ruby-core:59961] [Bug #9440]'
+    q = Queue.new
+    assert_raise(NoMethodError, bug9440) do
+      q.dup
+    end
+  end
 end