diff --git a/conftest.py b/conftest.py
--- a/conftest.py
+++ b/conftest.py
@@ -1,12 +1,10 @@
-import os
+import pathlib
 
 import mock
 import pytest
 import tg
 
 
-here = os.path.dirname(__file__)
-
 # HACK:
 def pytest_configure():
     # Register global dummy tg.context to avoid "TypeError: No object (name: context) has been registered for this thread"
@@ -15,24 +13,31 @@ def pytest_configure():
     # tg.request_local.context._pop_object ... but we keep it around forever as
     # a reasonable sentinel
 
+here_kallithea = str(pathlib.Path(__file__).parent / 'kallithea')
+
+# during doctest verification, normally all python files will be imported.
+# Thus, files that cannot be imported normally should be ignored.
+# Files that generate ImportErrors are ignored via
+# '--doctest-ignore-import-errors' (pytest.ini)
+kallithea_ignore_paths = (
+    # AttributeError: 'module' object has no attribute 'config'
+    '/kallithea/alembic/env.py',
+    # collection of the following file messes up the rest of test execution
+    '/kallithea/tests/scripts/manual_test_concurrency.py',
+)
+
 def pytest_ignore_collect(path):
+    path = str(path)
+
     # ignore all files outside the 'kallithea' directory
-    if not str(path).startswith(os.path.join(here, 'kallithea')):
+    if not path.startswith(here_kallithea):
         return True
 
-    # during doctest verification, normally all python files will be imported.
-    # Thus, files that cannot be imported normally should be ignored.
-    # Files that generate ImportErrors are ignored via
-    # '--doctest-ignore-import-errors' (pytest.ini)
-    kallithea_ignore_paths = (
-        # AttributeError: 'module' object has no attribute 'config'
-        '/kallithea/alembic/env.py',
-        # collection of the following file messes up the rest of test execution
-        '/kallithea/tests/scripts/manual_test_concurrency.py',
-    )
-    if str(path).endswith(kallithea_ignore_paths):
+    if path.endswith(kallithea_ignore_paths):
         return True
 
+    return None
+
 @pytest.fixture()
 def doctest_mock_ugettext(request):
     """Mock ugettext ('_') in the module using this fixture.
diff --git a/scripts/deps.py b/scripts/deps.py
--- a/scripts/deps.py
+++ b/scripts/deps.py
@@ -62,6 +62,7 @@ paginate
 paginate_sqlalchemy
 pam
 paste
+pathlib
 pkg_resources
 platform
 posixpath