Tests fail to run in Python 2.7.5

[Autumn Jolitz]

(cpython27) bjolit@BJOLIT1013mac:[pytypedecl] (master)$ python -B all_tests.py 
(Warning) Box not annotated
(Warning) Apple not annotated
(Warning) BadException not annotated
(Warning) Banana not annotated
(Warning) FooException not annotated
(Warning) Orange not annotated
(Warning) WrongException not annotated
(Warning) File not annotated
(Warning) Readable not annotated
(Warning) Writable not annotated
Traceback (most recent call last):
  File "all_tests.py", line 49, in <module>
    unittest.TextTestRunner().run(suite())
  File "all_tests.py", line 32, in suite
    tuple_eq = unittest.TestLoader().loadTestsFromTestCase(ast_test.TestTupleEq)
AttributeError: 'module' object has no attribute 'TestTupleEq'