How about a class level attribute?
import unittest
class FakeTest(unittest.TestCase):
cl_att = []
def test_a1(self):
self.assert_(True)
self.cl_att.append('a1')
print "cl_att:", self.cl_att
def test_a2(self):
self.assert_(True)
self.cl_att.append('a2')
print "cl_att:", self.cl_att
if __name__ == "__main__":
unittest.main()