bpo-40275: Use new test.support helper submodules in tests (GH-21315)

diff --git a/Lib/test/test_profile.py b/Lib/test/test_profile.py
index 01a8a6e..738be85 100644
--- a/Lib/test/test_profile.py
+++ b/Lib/test/test_profile.py
@@ -6,7 +6,8 @@
 import os
 from difflib import unified_diff
 from io import StringIO
-from test.support import TESTFN, run_unittest, unlink
+from test.support import run_unittest
+from test.support.os_helper import TESTFN, unlink
 from contextlib import contextmanager
 
 import profile