diff --git a/distutils/command/build_py.py b/distutils/command/build_py.py
index cf0ca57c32..edc2171cd1 100644
--- a/distutils/command/build_py.py
+++ b/distutils/command/build_py.py
@@ -5,7 +5,7 @@
 import os
 import importlib.util
 import sys
-from glob import glob
+import glob
 
 from distutils.core import Command
 from distutils.errors import *
@@ -125,7 +125,7 @@ def find_data_files(self, package, src_dir):
         files = []
         for pattern in globs:
             # Each pattern has to be converted to a platform-specific path
-            filelist = glob(os.path.join(src_dir, convert_path(pattern)))
+            filelist = glob.glob(os.path.join(glob.escape(src_dir), convert_path(pattern)))
             # Files that match more than one pattern are only added once
             files.extend([fn for fn in filelist if fn not in files
                 and os.path.isfile(fn)])
@@ -216,7 +216,7 @@ def check_module(self, module, module_file):
 
     def find_package_modules(self, package, package_dir):
         self.check_package(package, package_dir)
-        module_files = glob(os.path.join(package_dir, "*.py"))
+        module_files = glob.glob(os.path.join(glob.escape(package_dir), "*.py"))
         modules = []
         setup_script = os.path.abspath(self.distribution.script_name)
 
diff --git a/distutils/tests/__init__.py b/distutils/tests/__init__.py
index 5d2e69e3e6..c7dcc7ec3d 100644
--- a/distutils/tests/__init__.py
+++ b/distutils/tests/__init__.py
@@ -15,26 +15,26 @@
 import os
 import sys
 import unittest
-import warnings
 from test.support import run_unittest
 
+from .py38compat import save_restore_warnings_filters
+
 
 here = os.path.dirname(__file__) or os.curdir
 
 
 def test_suite():
-    old_filters = warnings.filters[:]
     suite = unittest.TestSuite()
     for fn in os.listdir(here):
         if fn.startswith("test") and fn.endswith(".py"):
             modname = "distutils.tests." + fn[:-3]
-            __import__(modname)
+            # bpo-40055: Save/restore warnings filters to leave them unchanged.
+            # Importing tests imports docutils which imports pkg_resources
+            # which adds a warnings filter.
+            with save_restore_warnings_filters():
+                __import__(modname)
             module = sys.modules[modname]
             suite.addTest(module.test_suite())
-    # bpo-40055: Save/restore warnings filters to leave them unchanged.
-    # Importing tests imports docutils which imports pkg_resources which adds a
-    # warnings filter.
-    warnings.filters[:] = old_filters
     return suite
 
 
diff --git a/distutils/tests/py38compat.py b/distutils/tests/py38compat.py
new file mode 100644
index 0000000000..46ff575892
--- /dev/null
+++ b/distutils/tests/py38compat.py
@@ -0,0 +1,50 @@
+# flake8: noqa
+
+import contextlib
+
+try:
+    from test.support.warnings_helper import check_warnings
+except (ModuleNotFoundError, ImportError):
+    from test.support import check_warnings
+
+
+try:
+    from test.support.os_helper import (
+        change_cwd,
+        rmtree,
+        EnvironmentVarGuard,
+        TESTFN,
+        unlink,
+        skip_unless_symlink,
+        temp_dir,
+        create_empty_file,
+        temp_cwd,
+    )
+except (ModuleNotFoundError, ImportError):
+    from test.support import (
+        change_cwd,
+        rmtree,
+        EnvironmentVarGuard,
+        TESTFN,
+        unlink,
+        skip_unless_symlink,
+        temp_dir,
+        create_empty_file,
+        temp_cwd,
+    )
+
+
+# From Python 3.9
+@contextlib.contextmanager
+def _save_restore_warnings_filters():
+    old_filters = warnings.filters[:]
+    try:
+        yield
+    finally:
+        warnings.filters[:] = old_filters
+
+
+try:
+    from test.support.warnings_helper import save_restore_warnings_filters
+except (ModuleNotFoundError, ImportError):
+    save_restore_warnings_filters = _save_restore_warnings_filters
diff --git a/distutils/tests/support.py b/distutils/tests/support.py
index 259af882ec..b4410fc9d9 100644
--- a/distutils/tests/support.py
+++ b/distutils/tests/support.py
@@ -6,7 +6,8 @@
 import unittest
 import sysconfig
 from copy import deepcopy
-import test.support
+
+from . import py38compat as os_helper
 
 from distutils import log
 from distutils.log import DEBUG, INFO, WARN, ERROR, FATAL
@@ -64,7 +65,7 @@ def tearDown(self):
         super().tearDown()
         while self.tempdirs:
             tmpdir = self.tempdirs.pop()
-            test.support.rmtree(tmpdir)
+            os_helper.rmtree(tmpdir)
 
     def mkdtemp(self):
         """Create a temporary directory that will be cleaned up.
diff --git a/distutils/tests/test_archive_util.py b/distutils/tests/test_archive_util.py
index e9aad0e40f..ce6456dc5d 100644
--- a/distutils/tests/test_archive_util.py
+++ b/distutils/tests/test_archive_util.py
@@ -13,7 +13,10 @@
                                     ARCHIVE_FORMATS)
 from distutils.spawn import find_executable, spawn
 from distutils.tests import support
-from test.support import check_warnings, run_unittest, patch, change_cwd
+from test.support import run_unittest, patch
+
+from .py38compat import change_cwd
+from .py38compat import check_warnings
 
 try:
     import grp
diff --git a/distutils/tests/test_bdist_msi.py b/distutils/tests/test_bdist_msi.py
index 418e60ec72..937266f8c0 100644
--- a/distutils/tests/test_bdist_msi.py
+++ b/distutils/tests/test_bdist_msi.py
@@ -1,9 +1,11 @@
 """Tests for distutils.command.bdist_msi."""
 import sys
 import unittest
-from test.support import run_unittest, check_warnings
+from test.support import run_unittest
 from distutils.tests import support
 
+from .py38compat import check_warnings
+
 
 @unittest.skipUnless(sys.platform == 'win32', 'these tests require Windows')
 class BDistMSITestCase(support.TempdirManager,
diff --git a/distutils/tests/test_bdist_wininst.py b/distutils/tests/test_bdist_wininst.py
index 5c3d025d33..31cf2628de 100644
--- a/distutils/tests/test_bdist_wininst.py
+++ b/distutils/tests/test_bdist_wininst.py
@@ -2,7 +2,9 @@
 import sys
 import platform
 import unittest
-from test.support import run_unittest, check_warnings
+from test.support import run_unittest
+
+from .py38compat import check_warnings
 
 from distutils.command.bdist_wininst import bdist_wininst
 from distutils.tests import support
diff --git a/distutils/tests/test_build_ext.py b/distutils/tests/test_build_ext.py
index 1aec153783..5a72458c16 100644
--- a/distutils/tests/test_build_ext.py
+++ b/distutils/tests/test_build_ext.py
@@ -15,6 +15,7 @@
 
 import unittest
 from test import support
+from . import py38compat as os_helper
 from test.support.script_helper import assert_python_ok
 
 # http://bugs.python.org/issue4373
@@ -38,7 +39,7 @@ def setUp(self):
         # bpo-30132: On Windows, a .pdb file may be created in the current
         # working directory. Create a temporary working directory to cleanup
         # everything at the end of the test.
-        change_cwd = support.change_cwd(self.tmp_dir)
+        change_cwd = os_helper.change_cwd(self.tmp_dir)
         change_cwd.__enter__()
         self.addCleanup(change_cwd.__exit__, None, None, None)
 
diff --git a/distutils/tests/test_core.py b/distutils/tests/test_core.py
index 27ce7324af..666ff4a3cd 100644
--- a/distutils/tests/test_core.py
+++ b/distutils/tests/test_core.py
@@ -5,8 +5,8 @@
 import os
 import shutil
 import sys
-import test.support
 from test.support import captured_stdout, run_unittest
+from . import py38compat as os_helper
 import unittest
 from distutils.tests import support
 from distutils import log
@@ -62,13 +62,13 @@ def tearDown(self):
         super(CoreTestCase, self).tearDown()
 
     def cleanup_testfn(self):
-        path = test.support.TESTFN
+        path = os_helper.TESTFN
         if os.path.isfile(path):
             os.remove(path)
         elif os.path.isdir(path):
             shutil.rmtree(path)
 
-    def write_setup(self, text, path=test.support.TESTFN):
+    def write_setup(self, text, path=os_helper.TESTFN):
         f = open(path, "w")
         try:
             f.write(text)
@@ -105,8 +105,8 @@ def test_run_setup_uses_current_dir(self):
         cwd = os.getcwd()
 
         # Create a directory and write the setup.py file there:
-        os.mkdir(test.support.TESTFN)
-        setup_py = os.path.join(test.support.TESTFN, "setup.py")
+        os.mkdir(os_helper.TESTFN)
+        setup_py = os.path.join(os_helper.TESTFN, "setup.py")
         distutils.core.run_setup(
             self.write_setup(setup_prints_cwd, path=setup_py))
 
diff --git a/distutils/tests/test_dist.py b/distutils/tests/test_dist.py
index d431085bbd..45eadee87f 100644
--- a/distutils/tests/test_dist.py
+++ b/distutils/tests/test_dist.py
@@ -12,8 +12,9 @@
 from distutils.cmd import Command
 
 from test.support import (
-     TESTFN, captured_stdout, captured_stderr, run_unittest
+     captured_stdout, captured_stderr, run_unittest
 )
+from .py38compat import TESTFN
 from distutils.tests import support
 from distutils import log
 
diff --git a/distutils/tests/test_extension.py b/distutils/tests/test_extension.py
index e35f2738b6..2eb5b422df 100644
--- a/distutils/tests/test_extension.py
+++ b/distutils/tests/test_extension.py
@@ -3,9 +3,11 @@
 import os
 import warnings
 
-from test.support import check_warnings, run_unittest
+from test.support import run_unittest
 from distutils.extension import read_setup_file, Extension
 
+from .py38compat import check_warnings
+
 class ExtensionTestCase(unittest.TestCase):
 
     def test_read_setup_file(self):
diff --git a/distutils/tests/test_file_util.py b/distutils/tests/test_file_util.py
index a4e2d025f9..d253607526 100644
--- a/distutils/tests/test_file_util.py
+++ b/distutils/tests/test_file_util.py
@@ -8,7 +8,9 @@
 from distutils import log
 from distutils.tests import support
 from distutils.errors import DistutilsFileError
-from test.support import run_unittest, unlink
+from test.support import run_unittest
+from .py38compat import unlink
+
 
 class FileUtilTestCase(support.TempdirManager, unittest.TestCase):
 
diff --git a/distutils/tests/test_filelist.py b/distutils/tests/test_filelist.py
index 71fde2b718..d8e4b39fd2 100644
--- a/distutils/tests/test_filelist.py
+++ b/distutils/tests/test_filelist.py
@@ -8,11 +8,11 @@
 from distutils.filelist import glob_to_re, translate_pattern, FileList
 from distutils import filelist
 
-import test.support
 from test.support import captured_stdout, run_unittest
 from distutils.tests import support
 
 from .py35compat import adapt_glob
+from . import py38compat as os_helper
 
 
 MANIFEST_IN = """\
@@ -298,9 +298,9 @@ def test_process_template(self):
 
 
 class FindAllTestCase(unittest.TestCase):
-    @test.support.skip_unless_symlink
+    @os_helper.skip_unless_symlink
     def test_missing_symlink(self):
-        with test.support.temp_cwd():
+        with os_helper.temp_cwd():
             os.symlink('foo', 'bar')
             self.assertEqual(filelist.findall(), [])
 
@@ -310,13 +310,13 @@ def test_basic_discovery(self):
         '.' as the parameter, the dot should be omitted from
         the results.
         """
-        with test.support.temp_cwd():
+        with os_helper.temp_cwd():
             os.mkdir('foo')
             file1 = os.path.join('foo', 'file1.txt')
-            test.support.create_empty_file(file1)
+            os_helper.create_empty_file(file1)
             os.mkdir('bar')
             file2 = os.path.join('bar', 'file2.txt')
-            test.support.create_empty_file(file2)
+            os_helper.create_empty_file(file2)
             expected = [file2, file1]
             self.assertEqual(sorted(filelist.findall()), expected)
 
@@ -325,9 +325,9 @@ def test_non_local_discovery(self):
         When findall is called with another path, the full
         path name should be returned.
         """
-        with test.support.temp_dir() as temp_dir:
+        with os_helper.temp_dir() as temp_dir:
             file1 = os.path.join(temp_dir, 'file1.txt')
-            test.support.create_empty_file(file1)
+            os_helper.create_empty_file(file1)
             expected = [file1]
             self.assertEqual(filelist.findall(temp_dir), expected)
 
diff --git a/distutils/tests/test_register.py b/distutils/tests/test_register.py
index e68b0af3ce..84607f996f 100644
--- a/distutils/tests/test_register.py
+++ b/distutils/tests/test_register.py
@@ -5,7 +5,9 @@
 import urllib
 import warnings
 
-from test.support import check_warnings, run_unittest
+from test.support import run_unittest
+
+from .py38compat import check_warnings
 
 from distutils.command import register as register_module
 from distutils.command.register import register
diff --git a/distutils/tests/test_sdist.py b/distutils/tests/test_sdist.py
index 23db126959..b087a81787 100644
--- a/distutils/tests/test_sdist.py
+++ b/distutils/tests/test_sdist.py
@@ -6,7 +6,9 @@
 import zipfile
 from os.path import join
 from textwrap import dedent
-from test.support import captured_stdout, check_warnings, run_unittest
+from test.support import captured_stdout, run_unittest
+
+from .py38compat import check_warnings
 
 try:
     import zlib
diff --git a/distutils/tests/test_spawn.py b/distutils/tests/test_spawn.py
index adaa48ef2d..f620da7843 100644
--- a/distutils/tests/test_spawn.py
+++ b/distutils/tests/test_spawn.py
@@ -4,9 +4,9 @@
 import sys
 import unittest.mock
 from test.support import run_unittest
-from test import support as test_support
 
 from .py35compat import unix_shell
+from . import py38compat as os_helper
 
 from distutils.spawn import find_executable
 from distutils.spawn import spawn
@@ -46,9 +46,9 @@ def test_spawn(self):
         spawn([exe])  # should work without any error
 
     def test_find_executable(self):
-        with test_support.temp_dir() as tmp_dir:
+        with os_helper.temp_dir() as tmp_dir:
             # use TESTFN to get a pseudo-unique filename
-            program_noeext = test_support.TESTFN
+            program_noeext = os_helper.TESTFN
             # Give the temporary program an ".exe" suffix for all.
             # It's needed on Windows and not harmful on other platforms.
             program = program_noeext + ".exe"
@@ -68,7 +68,7 @@ def test_find_executable(self):
                 self.assertEqual(rv, filename)
 
             # test find in the current directory
-            with test_support.change_cwd(tmp_dir):
+            with os_helper.change_cwd(tmp_dir):
                 rv = find_executable(program)
                 self.assertEqual(rv, program)
 
@@ -78,7 +78,7 @@ def test_find_executable(self):
             self.assertIsNone(rv)
 
             # PATH='': no match, except in the current directory
-            with test_support.EnvironmentVarGuard() as env:
+            with os_helper.EnvironmentVarGuard() as env:
                 env['PATH'] = ''
                 with unittest.mock.patch('distutils.spawn.os.confstr',
                                          return_value=tmp_dir, create=True), \
@@ -88,12 +88,12 @@ def test_find_executable(self):
                     self.assertIsNone(rv)
 
                     # look in current directory
-                    with test_support.change_cwd(tmp_dir):
+                    with os_helper.change_cwd(tmp_dir):
                         rv = find_executable(program)
                         self.assertEqual(rv, program)
 
             # PATH=':': explicitly looks in the current directory
-            with test_support.EnvironmentVarGuard() as env:
+            with os_helper.EnvironmentVarGuard() as env:
                 env['PATH'] = os.pathsep
                 with unittest.mock.patch('distutils.spawn.os.confstr',
                                          return_value='', create=True), \
@@ -102,12 +102,12 @@ def test_find_executable(self):
                     self.assertIsNone(rv)
 
                     # look in current directory
-                    with test_support.change_cwd(tmp_dir):
+                    with os_helper.change_cwd(tmp_dir):
                         rv = find_executable(program)
                         self.assertEqual(rv, program)
 
             # missing PATH: test os.confstr("CS_PATH") and os.defpath
-            with test_support.EnvironmentVarGuard() as env:
+            with os_helper.EnvironmentVarGuard() as env:
                 env.pop('PATH', None)
 
                 # without confstr
diff --git a/distutils/tests/test_sysconfig.py b/distutils/tests/test_sysconfig.py
index d5076391fc..c757194288 100644
--- a/distutils/tests/test_sysconfig.py
+++ b/distutils/tests/test_sysconfig.py
@@ -10,7 +10,11 @@
 from distutils import sysconfig
 from distutils.ccompiler import get_default_compiler
 from distutils.tests import support
-from test.support import TESTFN, run_unittest, check_warnings, swap_item
+from test.support import run_unittest, swap_item
+
+from .py38compat import TESTFN
+from .py38compat import check_warnings
+
 
 class SysconfigTestCase(support.EnvironGuard, unittest.TestCase):
     def setUp(self):
diff --git a/distutils/tests/test_unixccompiler.py b/distutils/tests/test_unixccompiler.py
index f2159662fd..1828ba1ae0 100644
--- a/distutils/tests/test_unixccompiler.py
+++ b/distutils/tests/test_unixccompiler.py
@@ -1,7 +1,9 @@
 """Tests for distutils.unixccompiler."""
 import sys
 import unittest
-from test.support import EnvironmentVarGuard, run_unittest
+from test.support import run_unittest
+
+from .py38compat import EnvironmentVarGuard
 
 from distutils import sysconfig
 from distutils.unixccompiler import UnixCCompiler