diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 70ecc54bfec2c5..00ff7a80932552 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -799,7 +799,8 @@ def __reduce__(self):
             q = self.Queue()
             q.put(NotSerializable())
             q.put(True)
-            self.assertTrue(q.get(timeout=0.1))
+            # bpo-30595: use a timeout of 1 second for slow buildbots
+            self.assertTrue(q.get(timeout=1.0))
 
 #
 #