Index: Lib/concurrent/futures/_base.py
===================================================================
--- Lib/concurrent/futures/_base.py	(revision 87092)
+++ Lib/concurrent/futures/_base.py	(working copy)
@@ -41,8 +41,6 @@
 
 # Logger for internal use by the futures package.
 LOGGER = logging.getLogger("concurrent.futures")
-STDERR_HANDLER = logging.StreamHandler()
-LOGGER.addHandler(STDERR_HANDLER)
 
 class Error(Exception):
     """Base class for all future-related exceptions."""
Index: Lib/test/test_concurrent_futures.py
===================================================================
--- Lib/test/test_concurrent_futures.py	(revision 87092)
+++ Lib/test/test_concurrent_futures.py	(working copy)
@@ -24,7 +24,7 @@
 from concurrent import futures
 from concurrent.futures._base import (
     PENDING, RUNNING, CANCELLED, CANCELLED_AND_NOTIFIED, FINISHED, Future,
-    LOGGER, STDERR_HANDLER, wait)
+    LOGGER, wait)
 import concurrent.futures.process
 
 def create_future(state=PENDING, exception=None, result=None):
@@ -620,7 +620,6 @@
         self.assertTrue(was_cancelled)
 
     def test_done_callback_raises(self):
-        LOGGER.removeHandler(STDERR_HANDLER)
         logging_stream = io.StringIO()
         handler = logging.StreamHandler(logging_stream)
         LOGGER.addHandler(handler)
@@ -646,7 +645,6 @@
             self.assertIn('Exception: doh!', logging_stream.getvalue())
         finally:
             LOGGER.removeHandler(handler)
-            LOGGER.addHandler(STDERR_HANDLER)
 
     def test_done_callback_already_successful(self):
         callback_result = None