diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 0274f791ba79bf..e0fe178cda14be 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -1382,9 +1382,9 @@ def test_exist_ok_existing_regular_file(self):
 
     @unittest.skipUnless(os.name == 'nt', "requires Windows")
     def test_win32_mkdir_700(self):
-        base = os_helper.TESTFN
-        path1 = os.path.join(os_helper.TESTFN, 'dir1')
-        path2 = os.path.join(os_helper.TESTFN, 'dir2')
+        base = support.TESTFN
+        path1 = os.path.join(support.TESTFN, 'dir1')
+        path2 = os.path.join(support.TESTFN, 'dir2')
         # mode=0o700 is special-cased to override ACLs on Windows
         # There's no way to know exactly how the ACLs will look, so we'll
         # check that they are different from a regularly created directory.
diff --git a/Lib/test/test_tempfile.py b/Lib/test/test_tempfile.py
index 9fe9d1d651433e..c1fdcea04bb935 100644
--- a/Lib/test/test_tempfile.py
+++ b/Lib/test/test_tempfile.py
@@ -780,7 +780,7 @@ def test_mode_win32(self):
             acl = None
             # First line of result includes our directory
             if line.startswith(dir):
-                acl = line.removeprefix(dir).strip()
+                acl = line[len(dir):].strip()
             elif line and line[:1].isspace():
                 acl = line.strip()
             if acl: