exclude :test_and_with_nonintegral_numeric, "needs investigation"
exclude :test_and_with_rational, "needs investigation"
exclude :test_frozen, "needs investigation"
exclude :test_or_with_nonintegral_numeric, "needs investigation"
exclude :test_or_with_rational, "needs investigation"
exclude :test_power_of_0, "needs investigation"
exclude :test_power_of_1_and_minus_1, "needs investigation"
exclude :test_xor_with_nonintegral_numeric, "needs investigation"
exclude :test_xor_with_rational, "needs investigation"
