An example of pytest output that shows doctests and unittests failures.

pytest_output.py

==================================================================== test session starts =====================================================================
platform linux -- Python 3.6.9, pytest-5.3.2, py-1.8.0, pluggy-0.13.1
rootdir: /home/vald/Projects/personal/doctests_discovery
collected 4 items

tests/test_models.py .                                                                                                                                 [ 25%]
tests/test_package_doctests.py F                                                                                                                       [ 50%]
tests/test_views.py .F                                                                                                                                 [100%]

========================================================================== FAILURES ==========================================================================
_____________________________________________________________________ test_doctest_suit ______________________________________________________________________

    def test_doctest_suit():
        test_suit = unittest.TestSuite()
        test_suit.addTest(doctest.DocTestSuite(models))
        test_suit.addTest(doctest.DocTestSuite(views))
        # There are 3 different levels of a verbosity parameter:
        # 0 (quiet): you just get the total numbers of tests executed and the global result
        # 1 (default): you get the same plus a dot for every successful test or a F for every failure
        # 2 (verbose): you get the help string of every test and the result
        runner = unittest.TextTestRunner(verbosity=2).run(test_suit)

>       assert not runner.failures
E       assert not [(dummy_model (app.models), 'Traceback (most recent call last):\n  File "/home/vald/.pyenv/versions/3.6.9/lib/python3....w[0]>", line 1, in <module>\n        view(1)\n    TypeError: view() takes 0 positional arguments but 1 was given\n\n')]
E        +  where [(dummy_model (app.models), 'Traceback (most recent call last):\n  File "/home/vald/.pyenv/versions/3.6.9/lib/python3....w[0]>", line 1, in <module>\n        view(1)\n    TypeError: view() takes 0 positional arguments but 1 was given\n\n')] = <unittest.runner.TextTestResult run=3 errors=0 failures=2>.failures

tests/test_package_doctests.py:18: AssertionError
-------------------------------------------------------------------- Captured stderr call --------------------------------------------------------------------
dummy_model (app.models)
Doctest: app.models.dummy_model ... FAIL
util (app.views)
Doctest: app.views.util ... ok
view (app.views)
Doctest: app.views.view ... FAIL

======================================================================
FAIL: dummy_model (app.models)
Doctest: app.models.dummy_model
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/vald/.pyenv/versions/3.6.9/lib/python3.6/doctest.py", line 2199, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for app.models.dummy_model
  File "/home/vald/Projects/personal/doctests_discovery/app/models.py", line 1, in dummy_model

----------------------------------------------------------------------
File "/home/vald/Projects/personal/doctests_discovery/app/models.py", line 4, in app.models.dummy_model
Failed example:
    dummy_model()
Expected:
    False
Got:
    True


======================================================================
FAIL: view (app.views)
Doctest: app.views.view
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/vald/.pyenv/versions/3.6.9/lib/python3.6/doctest.py", line 2199, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for app.views.view
  File "/home/vald/Projects/personal/doctests_discovery/app/views.py", line 1, in view

----------------------------------------------------------------------
File "/home/vald/Projects/personal/doctests_discovery/app/views.py", line 4, in app.views.view
Failed example:
    view(1)
Exception raised:
    Traceback (most recent call last):
      File "/home/vald/.pyenv/versions/3.6.9/lib/python3.6/doctest.py", line 1330, in __run
        compileflags, 1), test.globs)
      File "<doctest app.views.view[0]>", line 1, in <module>
        view(1)
    TypeError: view() takes 0 positional arguments but 1 was given


----------------------------------------------------------------------
Ran 3 tests in 0.003s

FAILED (failures=2)
____________________________________________________________________ test_dummy_unit_test ____________________________________________________________________

    def test_dummy_unit_test():
>       assert False
E       assert False

tests/test_views.py:9: AssertionError
================================================================ 2 failed, 2 passed in 0.06s =================================================================