def METHOD_NAME(self):
    self.assertEqual(number_in_binary_units(-1024), "-1K")
    self.assertEqual(number_in_binary_units(-(1024**2)), "-1M")
    self.assertEqual(number_in_binary_units(-(1024**3)), "-1G")
    self.assertEqual(number_in_binary_units(-(1024**4)), "-1T")
    self.assertEqual(number_in_binary_units(-(1024**5)), "-1P")
    self.assertEqual(number_in_binary_units(-(1024**6)), "-1E")
    self.assertEqual(number_in_binary_units(-(1024**7)), "-1Z")
    self.assertEqual(number_in_binary_units(-(1024**8)), "-1Y")