diff --git a/test/json/test_json_addition.rb b/test/json/test_json_addition.rb
index 6297578f1f..cc3820a073 100755
--- a/test/json/test_json_addition.rb
+++ b/test/json/test_json_addition.rb
@@ -164,9 +164,4 @@ class TC_JSONAddition < Test::Unit::TestCase
     d = DateTime.civil(2008, 6, 17, 11, 48, 32, Rational(12,24))
     assert_equal d, JSON.parse(d.to_json)
   end
-
-  def test_rational_complex
-    assert_equal Rational(2, 9), JSON(JSON(Rational(2, 9)))
-    assert_equal Complex(2, 9), JSON(JSON(Complex(2, 9)))
-  end
 end