bpo-40275: Remove test helpers aliases in test.support (GH-21771)

diff --git a/Lib/test/test_posixpath.py b/Lib/test/test_posixpath.py
index f37e825..42fd8ef 100644
--- a/Lib/test/test_posixpath.py
+++ b/Lib/test/test_posixpath.py
@@ -5,7 +5,7 @@
 from test import test_genericpath
 from test.support import import_helper
 from test.support import os_helper
-from test.support import FakePath
+from test.support.os_helper import FakePath
 from unittest import mock
 
 try: