nonvirtualunittest.py を使う例

mytests.py

import unittest
from nonvirtualunittest import TestCase

class BaseTestCase(TestCase):
    def setUp(self):
        self.foo = [1]

class MyTestCase(BaseTestCase):
    def setUp(self):
        self.foo.append(2)

    def test(self):
        self.foo.append(9)
        self.assertEqual(len(self.foo), 3) # pass