exclude :test_add_method_under_safe4, "needs investigation"
exclude :test_convert_type, "needs investigation"
exclude :test_freeze_under_safe_4, "needs investigation"
exclude :test_implicit_respond_to, "encoding mismatch on symbol"
exclude :test_method_missing, "needs investigation"
exclude :test_redefine_method_under_verbose, "needs investigation"
exclude :test_redefine_method_which_may_case_serious_problem, "needs investigation"
exclude :test_remove_method, "needs investigation"
exclude :test_respond_to_missing, "needs investigation"
exclude :test_superclass_method, "needs investigation"
exclude :test_to_s, "needs investigation"
exclude :test_untrusted, "needs investigation"
