1 files changed, 14 insertions, 0 deletions
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 5450c8ff3a..af3150b8a0 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -1663,6 +1663,20 @@ class TestModule < Test::Unit::TestCase
     end
   end
 
+  def test_singleton_class_ancestors
+    feature8035 = '[ruby-core:53171]'
+    obj = Object.new
+    assert_equal [obj.singleton_class, Object], obj.singleton_class.ancestors.first(2), feature8035
+
+    mod = Module.new
+    obj.extend mod
+    assert_equal [obj.singleton_class, mod, Object], obj.singleton_class.ancestors.first(3)
+
+    obj = Object.new
+    obj.singleton_class.send :prepend, mod
+    assert_equal [mod, obj.singleton_class, Object], obj.singleton_class.ancestors.first(3)
+  end
+
   private
 
   def assert_top_method_is_private(method)