def METHOD_NAME(self):
    """A ManyToManyColumn without explicit default should use the table default."""
    class Table(tables.Table):
        name = tables.Column(accessor="name", order_by=("last_name", "first_name"))
        friends = tables.ManyToManyColumn()
    table = Table(Person.objects.filter(first_name="Remi"))
    self.assertEqual(table.rows[0].get_cell("friends"), "—")