diff --git a/Lib/multiprocessing/managers.py b/Lib/multiprocessing/managers.py
index cded4f3..f6611af 100644
--- a/Lib/multiprocessing/managers.py
+++ b/Lib/multiprocessing/managers.py
@@ -582,7 +582,7 @@
             except Exception:
                 pass
 
-            process.join(timeout=0.2)
+            process.join(timeout=1.0)
             if process.is_alive():
                 util.info('manager still alive')
                 if hasattr(process, 'terminate'):
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index e4031f6..d79110a 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -1820,6 +1820,11 @@
     # run after all the other tests for the manager.  It tests that
     # there have been no "reference leaks" for the manager's shared
     # objects.  Note the comment in _TestPool.test_terminate().
+
+    # If some other test using ManagerMixin.manager fails, then the
+    # raised exception may keep alive a frame which holds a reference
+    # to a managed object.  This will cause test_number_of_objects to
+    # also fail.
     ALLOWED_TYPES = ('manager',)
 
     def test_number_of_objects(self):