Fix tests for Python 3.10

Author: domdfcoding

tests/test_paths_stdlib.py

@@ -19,7 +19,6 @@
 import sys
 import unittest
 from test import support  # type: ignore
-from test.support import TESTFN  # type: ignore
 from typing import Set
 from unittest import mock
 
@@ -37,6 +36,13 @@
 except ImportError:
 	grp = pwd = None  # type: ignore
 
+if sys.version_info[:2] >= (3, 10):
+	# stdlib
+	from test.support.os_helper import TESTFN
+else:
+	# stdlib
+	from test.support import TESTFN
+
 # Make sure any symbolic links in the base test path are resolved.
 BASE = os.path.realpath(TESTFN)
 join = lambda *x: os.path.join(BASE, *x)