diff --git a/Lib/multiprocessing/queues.py b/Lib/multiprocessing/queues.py
index 90844fe..89f4eb6 100644
--- a/Lib/multiprocessing/queues.py
+++ b/Lib/multiprocessing/queues.py
@@ -235,6 +235,7 @@ class Queue(object):
                         if obj is sentinel:
                             debug('feeder thread got sentinel -- exiting')
                             close()
+                            time.sleep(1)
                             return
 
                         # serialize the data before acquiring the lock
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 313c230..642c143 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -2038,7 +2038,7 @@ def threading_cleanup(*original_values):
 
     if not _thread:
         return
-    _MAX_COUNT = 100
+    _MAX_COUNT = 10
     t0 = time.monotonic()
     for count in range(_MAX_COUNT):
         values = _thread._count(), threading._dangling