1 files changed, 17 insertions, 0 deletions
diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index c7df789306..d79eb2b187 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -1944,6 +1944,23 @@ class TestRefinement < Test::Unit::TestCase
     end
   end
 
+  def test_refined_method_alias_warning
+    c = Class.new do
+      def t; :t end
+      def f; :f end
+    end
+    Module.new do
+      refine(c) do
+        alias foo t
+      end
+    end
+    assert_warning('', '[ruby-core:82385] [Bug #13817] refined method is not redefined') do
+      c.class_eval do
+        alias foo f
+      end
+    end
+  end
+
   private
 
   def eval_using(mod, s)