diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 4c17088dd029c4..83e9d165c411da 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -2578,7 +2578,7 @@ def test_async(self):
         self.assertTimingAlmostEqual(get.elapsed, TIMEOUT1)
 
     def test_async_timeout(self):
-        res = self.pool.apply_async(sqr, (6, TIMEOUT2 + 1.0))
+        res = self.pool.apply_async(sqr, (6, TIMEOUT2 + support.SHORT_TIMEOUT))
         get = TimingWrapper(res.get)
         self.assertRaises(multiprocessing.TimeoutError, get, timeout=TIMEOUT2)
         self.assertTimingAlmostEqual(get.elapsed, TIMEOUT2)