diff --git a/test/ruby/test_thread_cv.rb b/test/ruby/test_thread_cv.rb
index 88733419da..eb88b9606c 100644
--- a/test/ruby/test_thread_cv.rb
+++ b/test/ruby/test_thread_cv.rb
@@ -6,12 +6,6 @@ class TestThreadConditionVariable < Test::Unit::TestCase
   ConditionVariable = Thread::ConditionVariable
   Mutex = Thread::Mutex
 
-  def test_initialized
-    assert_raise(TypeError) {
-      ConditionVariable.allocate.wait(nil)
-    }
-  end
-
   def test_condvar_signal_and_wait
     mutex = Thread::Mutex.new
     condvar = Thread::ConditionVariable.new
diff --git a/test/ruby/test_thread_queue.rb b/test/ruby/test_thread_queue.rb
index 723450ad23..16a0490556 100644
--- a/test/ruby/test_thread_queue.rb
+++ b/test/ruby/test_thread_queue.rb
@@ -7,18 +7,6 @@ class TestThreadQueue < Test::Unit::TestCase
   Queue = Thread::Queue
   SizedQueue = Thread::SizedQueue
 
-  def test_queue_initialized
-    assert_raise(TypeError) {
-      Queue.allocate.push(nil)
-    }
-  end
-
-  def test_sized_queue_initialized
-    assert_raise(TypeError) {
-      SizedQueue.allocate.push(nil)
-    }
-  end
-
   def test_queue
     grind(5, 1000, 15, Queue)
   end