1 files changed, 11 insertions, 0 deletions
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 4bc725d2b5..047f7c99d3 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -309,6 +309,17 @@ class TestModule < Test::Unit::TestCase
     assert_equal([:MIXIN, :USER], User.constants.sort)
   end
 
+  def test_self_initialize_copy
+    bug9535 = '[ruby-dev:47989] [Bug #9535]'
+    m = Module.new do
+      def foo
+        :ok
+      end
+      initialize_copy(self)
+    end
+    assert_equal(:ok, Object.new.extend(m).foo, bug9535)
+  end
+
   def test_dup
     bug6454 = '[ruby-core:45132]'