diff --git a/test/ruby/test_class.rb b/test/ruby/test_class.rb
index 12f78dd..993eb3d 100644
--- a/test/ruby/test_class.rb
+++ b/test/ruby/test_class.rb
@@ -37,6 +37,14 @@ class TestClass < Test::Unit::TestCase
   # Start of tests
   # ------------------
 
+  def test_inspect_changes
+    x = Class.new
+    x.inspect
+    y = x.dup
+    refute_equal x, y
+    refute_equal x.inspect, y.inspect
+  end
+
   def test_s_inherited
     assert_equal([ClassTwo, ClassThree, ClassFour], ClassOne.new.subs)
   end