<filename>chapter03/test/test_module13.py
import unittest


class TestClass14(unittest.TestCase):
    def test_case01(self):
        # this one was different from the "self.fail()"
        raise Exception

<filename>chapter03/test/test_module13.py
import unittest


class TestClass14(unittest.TestCase):
    def test_case01(self):
        # this one was different from the "self.fail()"
        raise Exception

# this one was different from the "self.fail()"