1 files changed, 9 insertions, 0 deletions
diff --git a/test/ruby/test_thread_queue.rb b/test/ruby/test_thread_queue.rb
index fd77853f0e..545bf98888 100644
--- a/test/ruby/test_thread_queue.rb
+++ b/test/ruby/test_thread_queue.rb
@@ -19,6 +19,15 @@ class TestThreadQueue < Test::Unit::TestCase
     }
   end
 
+  def test_freeze
+    assert_raise(TypeError) {
+      Queue.new.freeze
+    }
+    assert_raise(TypeError) {
+      SizedQueue.new(5).freeze
+    }
+  end
+
   def test_queue
     grind(5, 1000, 15, Queue)
   end