diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 5100a207af2..73f44ad93af 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -11,6 +11,7 @@ import re
 import sysconfig
 import warnings
 import select
+import shutil
 try:
     import gc
 except ImportError:
@@ -488,11 +489,12 @@ class ProcessTestCase(BaseTestCase):
         else:
             max_handles = 2050 # too much for (at least some) Windows setups
         handles = []
+        tmpdir = tempfile.mkdtemp()
         try:
             for i in range(max_handles):
                 try:
-                    handles.append(os.open(support.TESTFN,
-                                           os.O_WRONLY | os.O_CREAT))
+                    tmpfile = os.path.join(tmpdir, support.TESTFN)
+                    handles.append(os.open(tmpfile, os.O_WRONLY|os.O_CREAT))
                 except OSError as e:
                     if e.errno != errno.EMFILE:
                         raise
@@ -517,6 +519,7 @@ class ProcessTestCase(BaseTestCase):
         finally:
             for h in handles:
                 os.close(h)
+            shutil.rmtree(tmpdir)
 
     def test_list2cmdline(self):
         self.assertEqual(subprocess.list2cmdline(['a b c', 'd', 'e']),