After https://gerrit.wikimedia.org/r/#/c/433712/ the following warnings are preventing doc build to build docs for tests and families:
```
10:57:49 WARNING: /src/pywikibot/tools/__init__.py:153: _NotImplementedWarning: pywikibot.families.wikimediachapter_family.Family.countries is deprecated.
10:57:49 return self.method(owner)
10:57:49
10:57:49 WARNING: /src/pywikibot/tools/__init__.py:153: _NotImplementedWarning: pywikibot.families.wikimediachapter_family.Family.countries is deprecated.
10:57:49 return self.method(owner)
10:57:49
10:57:49 WARNING: /src/pywikibot/tools/__init__.py:153: _NotImplementedWarning: pywikibot.families.wikimediachapter_family.Family.countries is deprecated.
10:57:49 return self.method(owner)
10:57:49
10:57:49 WARNING: /src/pywikibot/family.py:997: FamilyMaintenanceWarning: Family name None does not match family module name wikipedia
10:57:49 % (cls.name, fam), FamilyMaintenanceWarning)
10:57:49
10:57:49 WARNING: /src/pywikibot/family.py:997: FamilyMaintenanceWarning: Family name None does not match family module name test
10:57:49 % (cls.name, fam), FamilyMaintenanceWarning)
```
```
10:57:49 WARNING: autodoc: failed to import module 'tests.l10n_tests'; the following exception was raised:
10:57:49 Traceback (most recent call last):
10:57:49 File "/src/.tox/doc/lib/python3.4/site-packages/sphinx/ext/autodoc/importer.py", line 140, in import_module
10:57:49 __import__(modname)
10:57:49 File "/src/tests/l10n_tests.py", line 83, in <module>
10:57:49 class TestValidTemplate(TestCase):
10:57:49 File "/src/tests/utils.py", line 110, in add_metaclass
10:57:49 return six.add_metaclass(cls.__metaclass__)(cls)
10:57:49 File "/src/.tox/doc/lib/python3.4/site-packages/six.py", line 847, in wrapper
10:57:49 return metaclass(cls.__name__, cls.__bases__, orig_vars)
10:57:49 File "/src/tests/l10n_tests.py", line 66, in __new__
10:57:49 site = pywikibot.Site(dct['code'], dct['family'])
10:57:49 File "/src/pywikibot/__init__.py", line 1245, in Site
10:57:49 fam = Family.load(fam)
10:57:49 File "/src/pywikibot/tools/__init__.py", line 1426, in wrapper
10:57:49 return obj(*__args, **__kw)
10:57:49 File "/src/pywikibot/family.py", line 1000, in load
10:57:49 if not all(x in NAME_CHARACTERS for x in cls.name):
10:57:49 TypeError: 'NoneType' object is not iterable
```