2 files changed, 16 insertions, 0 deletions
diff --git a/test/thread/test_cv.rb b/test/thread/test_cv.rb
index 08459a0a04..53f3261390 100644
--- a/test/thread/test_cv.rb
+++ b/test/thread/test_cv.rb
@@ -195,6 +195,14 @@ 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
+
   (DumpableCV = ConditionVariable.dup).class_eval {remove_method :marshal_dump}
 
   def test_dump
diff --git a/test/thread/test_queue.rb b/test/thread/test_queue.rb
index 314ee98dab..c33cb6dc8a 100644
--- a/test/thread/test_queue.rb
+++ b/test/thread/test_queue.rb
@@ -220,6 +220,14 @@ class TestQueue < Test::Unit::TestCase
     end
   end
 
+  def test_dup
+    bug9440 = '[ruby-core:59961] [Bug #9440]'
+    q = Queue.new
+    assert_raise(NoMethodError, bug9440) do
+      q.dup
+    end
+  end
+
   (DumpableQueue = Queue.dup).class_eval {remove_method :marshal_dump}
 
   def test_dump