python
diff --git a/‎Lib/test/test_concurrent_futures.py‎
Lines changed: 11 additions & 3 deletions b/‎Lib/test/test_concurrent_futures.py‎
Lines changed: 11 additions & 3 deletions
diff --git a/‎Misc/NEWS.d/next/Tests/2019-12-18-14-52-08.bpo-38546.2kxNuM.rst‎
Lines changed: 3 additions & 0 deletions b/‎Misc/NEWS.d/next/Tests/2019-12-18-14-52-08.bpo-38546.2kxNuM.rst‎
Lines changed: 3 additions & 0 deletions
@@ -84,8 +84,7 @@ def my_method(self):
 
 
 class EventfulGCObj():
-    def __init__(self, ctx):
-        mgr = get_context(ctx).Manager()
+    def __init__(self, mgr):
         self.event = mgr.Event()
 
     def __del__(self):
@@ -818,12 +817,21 @@ def test_traceback(self):
     def test_ressources_gced_in_workers(self):
         # Ensure that argument for a job are correctly gc-ed after the job
         # is finished
-        obj = EventfulGCObj(self.ctx)
+        mgr = get_context(self.ctx).Manager()
+        obj = EventfulGCObj(mgr)
         future = self.executor.submit(id, obj)
         future.result()
 
         self.assertTrue(obj.event.wait(timeout=1))
 
+        # explicitly destroy the object to ensure that EventfulGCObj.__del__()
+        # is called while manager is still running.
+        obj = None
+        test.support.gc_collect()
+
+        mgr.shutdown()
+        mgr.join()
+
 
 create_executor_tests(ProcessPoolExecutorTest,
                       executor_mixins=(ProcessPoolForkMixin,
 
@@ -0,0 +1,3 @@
+Fix test_ressources_gced_in_workers() of test_concurrent_futures: explicitly
+stop the manager to prevent leaking a child process running in the background
+after the test completes.
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+Fix test_ressources_gced_in_workers() of test_concurrent_futures: explicitly`
	`2`	`+stop the manager to prevent leaking a child process running in the background`
	`3`	`+after the test completes.`