Ticket #28869: test_foo.py

from django.test import TestCase, tag

@tag('foo-tests')
class FooBase(TestCase):
    ...

class FooBar(FooBase):

    def test_true(self):
        self.assertTrue(True)

@tag('baz-tests')
class FooBaz(FooBase):

    def test_true(self):
        self.assertTrue(True)