============================= test session starts ==============================
platform linux2 -- Python 2.7.15, pytest-4.3.1, py-1.7.0, pluggy-0.8.0
rootdir: /home/travis/build/carlosperate/microfs, inifile:
plugins: cov-2.6.1
collected 40 items                                                             
tests/test_microfs.py ....F...................................           [100%]
=================================== FAILURES ===================================
__________________ test_raw_on_failures_command_line_flag_on ___________________
    def test_raw_on_failures_command_line_flag_on():
        """
        If the COMMAND_LINE_FLAG is True, ensure the last data received is output
        via the print statemen for debugging purposes.
        """
>       with mock.patch('builtins.print') as mock_print, \
tests/test_microfs.py:161: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../virtualenv/python2.7.15/lib/python2.7/site-packages/mock/mock.py:1353: in __enter__
    self.target = self.getter()
../../../virtualenv/python2.7.15/lib/python2.7/site-packages/mock/mock.py:1523: in <lambda>
    getter = lambda: _importer(target)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
target = 'builtins'
    def _importer(target):
        components = target.split('.')
        import_path = components.pop(0)
>       thing = __import__(import_path)
E       ImportError: No module named builtins
../../../virtualenv/python2.7.15/lib/python2.7/site-packages/mock/mock.py:1206: ImportError
---------- coverage: platform linux2, python 2.7.15-final-0 ----------
Name         Stmts   Miss  Cover   Missing
------------------------------------------
microfs.py     176      1    99%   71
===================== 1 failed, 39 passed in 1.46 seconds ======================
Makefile:36: recipe for target 'coverage' failed
make: *** [coverage] Error 1
The command "make check" exited with 2.