'py.test' and 'make test' don't return the same result

[Libisch]

When running tests, make test fails, while py.test tests/... passes.

Reproduce:
in clearmash/api.py:

• add

    def get_document_related_docs_by_fields(self, entity_id, field, max_nesting_depth=1):
        return self._wcm_api_call("/Document/ByRelationField", {"EntityId": entity_id, "FieldId": field, "MaxNestingDepth": max_nesting_depth})

in tests/test_clearmash_api.py:

• add

def test_get_related_docs_of_item():
    fields = ['_c6_beit_hatfutsot_bh_base_template_family_name',
            '_c6_beit_hatfutsot_bh_base_template_multimedia_movies',
            '_c6_beit_hatfutsot_bh_base_template_multimedia_music',
            '_c6_beit_hatfutsot_bh_base_template_multimedia_photos',
            '_c6_beit_hatfutsot_bh_base_template_related_exhibition',
            '_c6_beit_hatfutsot_bh_base_template_related_musictext',
            '_c6_beit_hatfutsot_bh_base_template_related_personality',
            '_c6_beit_hatfutsot_bh_base_template_related_place',
            '_c6_beit_hatfutsot_bh_base_template_related_recieve_unit',
            '_c6_beit_hatfutsot_bh_base_template_source',
            '_c6_beit_hatfutsot_bh_place_located_in',
            '_c6_beit_hatfutsot_bh_place_locations',
            '_c6_beit_hatfutsot_bh_place_personality_birth',
            '_c6_beit_hatfutsot_bh_place_personality_death']
    related = [MockClearmashApi().get_document_related_docs_by_fields(220590, field) for field in fields]
    assert len(related) == 14

1. Run $ py.test tests/test_clearmash_api.py -k test_get_related_docs_of_item
   Expected:
   1 passed
   Actual:
   1 passed

(ENV) Libis-MacBook-Pro:mojp-dbs-pipelines libi$ py.test tests/test_clearmash_api.py -k test_get_related_docs_of_item
================================================= test session starts ==================================================
platform darwin -- Python 3.6.1, pytest-3.1.3, py-1.4.34, pluggy-0.4.0
rootdir: /Users/libi/mojp-dbs-pipelines, inifile: tox.ini
plugins: celery-4.0.2
collected 6 items 

tests/test_clearmash_api.py .

================================================== 5 tests deselected ==================================================
======================================== 1 passed, 5 deselected in 0.37 seconds ========================================

2. Run $ make install and then $ make test
   Expected:
   16 passed
   Actual:
   1 failed (test_get_related_docs_of_item)

======================================================= FAILURES =======================================================
____________________________________________ test_get_related_docs_of_item _____________________________________________

    def test_get_related_docs_of_item():
        fields = ['_c6_beit_hatfutsot_bh_base_template_family_name',
                '_c6_beit_hatfutsot_bh_base_template_multimedia_movies',
                '_c6_beit_hatfutsot_bh_base_template_multimedia_music',
                '_c6_beit_hatfutsot_bh_base_template_multimedia_photos',
                '_c6_beit_hatfutsot_bh_base_template_related_exhibition',
                '_c6_beit_hatfutsot_bh_base_template_related_musictext',
                '_c6_beit_hatfutsot_bh_base_template_related_personality',
                '_c6_beit_hatfutsot_bh_base_template_related_place',
                '_c6_beit_hatfutsot_bh_base_template_related_recieve_unit',
                '_c6_beit_hatfutsot_bh_base_template_source',
                '_c6_beit_hatfutsot_bh_place_located_in',
                '_c6_beit_hatfutsot_bh_place_locations',
                '_c6_beit_hatfutsot_bh_place_personality_birth',
                '_c6_beit_hatfutsot_bh_place_personality_death']
>       related = [MockClearmashApi().get_document_related_docs_by_fields(220590, field) for field in fields]

tests/test_clearmash_api.py:174: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
tests/test_clearmash_api.py:174: in <listcomp>
    related = [MockClearmashApi().get_document_related_docs_by_fields(220590, field) for field in fields]
datapackage_pipelines_mojp/clearmash/api.py:75: in get_document_related_docs_by_fields
    return self._wcm_api_call("/Document/ByRelationField", {"EntityId": entity_id, "FieldId": field, "MaxNestingDepth": max_nesting_depth})
datapackage_pipelines_mojp/clearmash/api.py:80: in _wcm_api_call
    post_data=post_data)
tests/test_clearmash_api.py:53: in _get_request_json
    res = self._get_mock_url_request_json(filename, get_res)
tests/test_clearmash_api.py:25: in _get_mock_url_request_json
    return json.load(f)
/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/__init__.py:296: in load
    return loads(fp.read(),
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <encodings.ascii.IncrementalDecoder object at 0x1060e0828>
input = b'{\n\t"Entities": [\n\t\t{\n\t\t\t"Acl": "None",\n\t\t\t"Changeset": 4793755,\n\t\t\t"Document": {\n\t\t\t\t"Fields_B...\xd7\x99\xd7\x95\xd7\xa7\xd7\x9f, \xd7\xa4\xd7\x95\xd7\xa8\xd7\x98\xd7\xa8\xd7\x98"\n\t\t\t\t}\n\t\t\t]\n\t\t}\n\t]\n}'
final = True

    def decode(self, input, final=False):
>       return codecs.ascii_decode(input, self.errors)[0]
E       UnicodeDecodeError: 'ascii' codec can't decode byte 0xd7 in position 10417: ordinal not in range(128)

.tox/python/lib/python3.6/encodings/ascii.py:26: UnicodeDecodeError
========================================= 1 failed, 15 passed in 2.54 seconds ==========================================
ERROR: InvocationError: '/Users/libi/mojp-dbs-pipelines/.tox/python/bin/py.test -s'
_______________________________________________________ summary ________________________________________________________
ERROR:   python: commands failed
make: *** [test] Error 1

[Libisch]

@OriHoch