diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index f446ef34fe67b1..749cf8c4fd2c49 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -1039,9 +1039,10 @@ def test_timeout(self):
         start = time.time()
         self.assertRaises(pyqueue.Empty, q.get, True, 0.200)
         delta = time.time() - start
-        # Tolerate a delta of 50 ms because of the bad clock resolution on
-        # Windows (usually 15.6 ms)
-        self.assertGreaterEqual(delta, 0.150)
+        # bpo-30317: Tolerate a delta of 100 ms because of the bad clock
+        # resolution on Windows (usually 15.6 ms). x86 Windows7 3.x once
+        # failed because the delta was only 135.8 ms.
+        self.assertGreaterEqual(delta, 0.100)
         close_queue(q)
 
     def test_queue_feeder_donot_stop_onexc(self):