diff --git a/Lib/test/libregrtest/refleak.py b/Lib/test/libregrtest/refleak.py
index 8d22123..77298d3 100644
--- a/Lib/test/libregrtest/refleak.py
+++ b/Lib/test/libregrtest/refleak.py
@@ -4,6 +4,8 @@
 import warnings
 from inspect import isabstract
 from test import support
+from test.support import os_helper
+
 try:
     from _abc import _get_dump
 except ImportError:
@@ -61,7 +63,7 @@
         return int_pool.setdefault(value, value)
 
     nwarmup, ntracked, fname = ns.huntrleaks
-    fname = os.path.join(support.SAVEDCWD, fname)
+    fname = os.path.join(os_helper.SAVEDCWD, fname)
     repcount = nwarmup + ntracked
 
     # Pre-allocate to ensure that the loop doesn't allocate anything new
@@ -71,7 +73,7 @@
     fd_deltas = [0] * repcount
     getallocatedblocks = sys.getallocatedblocks
     gettotalrefcount = sys.gettotalrefcount
-    fd_count = support.fd_count
+    fd_count = os_helper.fd_count
 
     # initialize variables to make pyflakes quiet
     rc_before = alloc_before = fd_before = 0
diff --git a/Lib/test/libregrtest/win_utils.py b/Lib/test/libregrtest/win_utils.py
index 028c011..a1cc220 100644
--- a/Lib/test/libregrtest/win_utils.py
+++ b/Lib/test/libregrtest/win_utils.py
@@ -5,7 +5,7 @@
 import subprocess
 import uuid
 import winreg
-from test import support
+from test.support import os_helper
 from test.libregrtest.utils import print_warning
 
 
@@ -69,7 +69,9 @@
         # Spawn off the load monitor
         counter_name = self._get_counter_name()
         command = ['typeperf', counter_name, '-si', str(SAMPLING_INTERVAL)]
-        self._popen = subprocess.Popen(' '.join(command), stdout=command_stdout, cwd=support.SAVEDCWD)
+        self._popen = subprocess.Popen(' '.join(command),
+                                       stdout=command_stdout,
+                                       cwd=os_helper.SAVEDCWD)
 
         # Close our copy of the write end of the pipe
         os.close(command_stdout)
diff --git a/Lib/test/test_audit.py b/Lib/test/test_audit.py
index f79edbc..4f8d06a 100644
--- a/Lib/test/test_audit.py
+++ b/Lib/test/test_audit.py
@@ -5,6 +5,9 @@
 import sys
 import unittest
 from test import support
+from test.support import import_helper
+from test.support import os_helper
+
 
 if not hasattr(sys, "addaudithook") or not hasattr(sys, "audit"):
     raise unittest.SkipTest("test only relevant when sys.audit is available")
@@ -52,7 +55,7 @@
         self.do_test("test_block_add_hook_baseexception")
 
     def test_pickle(self):
-        support.import_module("pickle")
+        import_helper.import_module("pickle")
 
         self.do_test("test_pickle")
 
@@ -60,7 +63,7 @@
         self.do_test("test_monkeypatch")
 
     def test_open(self):
-        self.do_test("test_open", support.TESTFN)
+        self.do_test("test_open", os_helper.TESTFN)
 
     def test_cantrace(self):
         self.do_test("test_cantrace")
@@ -89,7 +92,7 @@
         )
 
     def test_winreg(self):
-        support.import_module("winreg")
+        import_helper.import_module("winreg")
         returncode, events, stderr = self.run_python("test_winreg")
         if returncode:
             self.fail(stderr)
@@ -103,7 +106,7 @@
         self.assertSequenceEqual(["winreg.PyHKEY.Detach", " ", expected], events[4])
 
     def test_socket(self):
-        support.import_module("socket")
+        import_helper.import_module("socket")
         returncode, events, stderr = self.run_python("test_socket")
         if returncode:
             self.fail(stderr)
diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index 61b4b91..e61228d 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -17,6 +17,7 @@
 
 import test.support
 from test.support import import_helper
+from test.support import warnings_helper
 import test.string_tests
 import test.list_tests
 from test.support import bigaddrspacetest, MAX_Py_ssize_t
@@ -27,7 +28,7 @@
     def check_bytes_warnings(func):
         @functools.wraps(func)
         def wrapper(*args, **kw):
-            with test.support.check_warnings(('', BytesWarning)):
+            with warnings_helper.check_warnings(('', BytesWarning)):
                 return func(*args, **kw)
         return wrapper
 else:
@@ -1769,7 +1770,7 @@
                          "BytesWarning is needed for this test: use -bb option")
     def test_compare(self):
         def bytes_warning():
-            return test.support.check_warnings(('', BytesWarning))
+            return warnings_helper.check_warnings(('', BytesWarning))
         with bytes_warning():
             b'' == ''
         with bytes_warning():
diff --git a/Lib/test/test_dbm_ndbm.py b/Lib/test/test_dbm_ndbm.py
index 278fca2..e17a1d9 100644
--- a/Lib/test/test_dbm_ndbm.py
+++ b/Lib/test/test_dbm_ndbm.py
@@ -1,5 +1,6 @@
 from test import support
 from test.support import import_helper
+from test.support import os_helper
 import_helper.import_module("dbm.ndbm") #skip if not supported
 import os
 import unittest
@@ -9,7 +10,7 @@
 class DbmTestCase(unittest.TestCase):
 
     def setUp(self):
-        self.filename = support.TESTFN
+        self.filename = os_helper.TESTFN
         self.d = dbm.ndbm.open(self.filename, 'c')
         self.d.close()
 
@@ -102,10 +103,10 @@
             with self.assertRaises(error):
                 db[b'not exist key'] = b'not exist value'
 
-    @unittest.skipUnless(support.TESTFN_NONASCII,
+    @unittest.skipUnless(os_helper.TESTFN_NONASCII,
                          'requires OS support of non-ASCII encodings')
     def test_nonascii_filename(self):
-        filename = support.TESTFN_NONASCII
+        filename = os_helper.TESTFN_NONASCII
         for suffix in ['', '.pag', '.dir', '.db']:
             self.addCleanup(support.unlink, filename + suffix)
         with dbm.ndbm.open(filename, 'c') as db:
diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py
index 9738fb5..307416c 100644
--- a/Lib/test/test_descr.py
+++ b/Lib/test/test_descr.py
@@ -2975,12 +2975,12 @@
         ##             self.ateof = 1
         ##        return s
         ##
-        ## f = file(name=support.TESTFN, mode='w')
+        ## f = file(name=os_helper.TESTFN, mode='w')
         ## lines = ['a\n', 'b\n', 'c\n']
         ## try:
         ##     f.writelines(lines)
         ##     f.close()
-        ##     f = CountedInput(support.TESTFN)
+        ##     f = CountedInput(os_helper.TESTFN)
         ##     for (i, expected) in zip(range(1, 5) + [4], lines + 2 * [""]):
         ##         got = f.readline()
         ##         self.assertEqual(expected, got)
@@ -2992,7 +2992,7 @@
         ##         f.close()
         ##     except:
         ##         pass
-        ##     support.unlink(support.TESTFN)
+        ##     os_helper.unlink(os_helper.TESTFN)
 
     def test_keywords(self):
         # Testing keyword args to basic type constructors ...
diff --git a/Lib/test/test_xml_etree.py b/Lib/test/test_xml_etree.py
index 63f9b92..c7d4461 100644
--- a/Lib/test/test_xml_etree.py
+++ b/Lib/test/test_xml_etree.py
@@ -111,7 +111,7 @@
 def checkwarnings(*filters, quiet=False):
     def decorator(test):
         def newtest(*args, **kwargs):
-            with support.check_warnings(*filters, quiet=quiet):
+            with warnings_helper.check_warnings(*filters, quiet=quiet):
                 test(*args, **kwargs)
         functools.update_wrapper(newtest, test)
         return newtest