For those stuck on the first unit tests (Spoilers)

[AppleBottomSneed]

Remember to check the errors the unit tests throw at you and have a thorough look on why it is.

In this case, under test_car_park.py:

def test_car_park_initialized_with_all_attributes(self):
    self.assertIsInstance(self.car_park, CarPark)
    self.assertEqual(self.car_park.location, "123 Example Street")
    self.assertEqual(self.car_park.capacity, 100)
    self.assertEqual(self.car_park.plates, [])
    self.assertEqual(self.car_park.sensors, [])
    self.assertEqual(self.car_park.displays, [])
    self.assertEqual(self.car_park.available_bays, 100)

I overlooked it and forgot to properly instance the lists as they're mutable and should never be set as the default by itself i.e. plates, sensors and displays. Hope this helps

[rafrafavi]

@AppleBottomSneed - I know it was a while ago, but I am just going through and making fixes - can you recall what the action steps were here?