================================================== test session starts ===================================================
platform linux2 -- Python 2.7.3 -- py-1.4.26 -- pytest-2.6.4
plugins: xdist, cov, mock
collected 1 items 

test_assertion.py F

======================================================== FAILURES ========================================================
________________________________________________ TestFails.test_assertion ________________________________________________

self = <test_assertion.TestFails testMethod=test_assertion>

    def test_assertion(self):
        with self.assertRaises(AssertionError):
>           assert_helper()

test_assertion.py:9: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   assert 3 == 4
E   AssertionError

assert_helper.py:2: AssertionError
=============================================== slowest 15 test durations ================================================
0.00s setup    test_assertion.py::TestFails::test_assertion
0.00s call     test_assertion.py::TestFails::test_assertion
0.00s teardown test_assertion.py::TestFails::test_assertion
================================================ 1 failed in 0.01 seconds ================================================