diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index f1c91435b5e..8b2699db05b 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -1022,6 +1022,9 @@ class POSIXProcessTestCase(BaseTestCase):
         self.assertTrue(readfiles, "The child hung")
         self.assertEqual(p2.stdout.read(), data)
 
+        p1.stdout.close()
+        p2.stdout.close()
+
     def test_close_fds(self):
         fd_status = support.findfile("fd_status.py", subdir="subprocessdata")