1 files changed, 21 insertions, 0 deletions
diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index e367532ec5..3ca00ed912 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -801,4 +801,25 @@ class TestRefinement < Test::Unit::TestCase
       p c.foo
     INPUT
   end
+
+  def test_circular_using_is_not_allowed
+    a = Module.new
+    b = Module.new
+
+    assert_raise ArgumentError do
+      a.module_eval do
+        using a
+      end
+    end
+
+    b.module_eval do
+      using a
+    end
+
+    assert_raise ArgumentError do
+      a.module_eval do
+        using b
+      end
+    end
+  end
 end