You are testing with an id of `` but the maximum for a normal integer is `` as listed [here](https://docs.djangoproject.com/en/dev/ref/models/fields/#django.db.models.IntegerField). Increase this to 200 Billion or something obnoxiously large to prove the point. Also, since it seems this same number is used as the ID throughout the tests, consider storing this in a variable above then referencing that variable throughout these tests.