Move setuptools-specific excluded folders to collect_ignore to match with jaraco/skeleton.

conftest.py

@@ -16,6 +16,11 @@ collect_ignore = [
     'setuptools/tests/mod_with_constant.py',
     'setuptools/_distutils',
     '_distutils_hack',
+    'setuptools/extern',
+    'pkg_resources/extern',
+    'pkg_resources/tests/data',
+    'setuptools/_vendor',
+    'pkg_resources/_vendor',
 ]
 
 

pytest.ini

 [pytest]
 addopts=--doctest-modules --doctest-glob=pkg_resources/api_tests.txt -r sxX
-norecursedirs=dist build *.egg setuptools/extern pkg_resources/extern pkg_resources/tests/data tools .* setuptools/_vendor pkg_resources/_vendor
+norecursedirs=dist build .tox .eggs
 doctest_optionflags=ELLIPSIS ALLOW_UNICODE
 filterwarnings =
     # Fail on warnings