exclude :test_append_features, "needs investigation"
exclude :test_check_inheritable, "needs investigation"
exclude :test_class_cmp, "needs investigation"
exclude :test_class_initialize, "needs investigation"
exclude :test_clone, "needs investigation"
exclude :test_extend_object, "needs investigation"
exclude :test_invalid_jump_from_class_definition, "needs investigation"
exclude :test_method_redefinition, "needs investigation"
exclude :test_module_function, "needs investigation"
exclude :test_nested_class_removal, "needs investigation"
exclude :test_nonascii_name, "needs investigation"
exclude :test_prepend_features, "needs investigation"
exclude :test_redefine_private_class, "needs investigation"
exclude :test_singleton_class, "needs investigation"
exclude :test_uninitialized, "needs investigation"
exclude :test_cannot_reinitialize_class_with_initialize_copy,  "needs investigation"
exclude :test_cloned_class, "needs investigation"
exclude :test_constant_access_from_method_in_cloned_module, "needs investigation"
exclude :test_singleton_class_message, "needs investigation"
exclude :test_singleton_class_of_frozen_object,  "needs investigation"
exclude :test_singleton_class_p, "needs investigation"
exclude :test_cloned_singleton_method_added, "needs investigation"
