exclude :test_hash, "needs investigation"
exclude :test_or, "needs investigation"
exclude :test_and, "needs investigation"
exclude :test_carrot, "needs investigation"
exclude :test_equal, "needs investigation"
exclude :test_include?, "needs investigation"
exclude :test_mask, "needs investigation"
exclude :test_shift_left, "needs investigation"
exclude :test_shift_right, "needs investigation"
