Fix issue 10527: make multiprocessing use poll() instead of select() if available.
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index ab6d36a..fa4865b 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -1574,6 +1574,7 @@
         self.assertTimingAlmostEqual(poll.elapsed, TIMEOUT1)
 
         conn.send(None)
+        time.sleep(.1)
 
         self.assertEqual(poll(TIMEOUT1), True)
         self.assertTimingAlmostEqual(poll.elapsed, 0)