Some tests in test_socket and test_asyncio are receiving timeouts in AMD64 Windows10 3.x buildbots: 

test_asyncio: https://buildbot.python.org/all/#/builders/3/builds/1192
test_socket: https://buildbot.python.org/all/#/builders/3/builds/1191

Sample error messages:

test_not_implemented (test.test_asyncio.test_events.AbstractEventLoopTests) ... ok
Timeout (0:15:00)!
Thread 0x00001a74 (most recent call first):
  File "D:\buildarea\3.x.bolen-windows10\build\lib\socket.py", line 212 in accept
  File "D:\buildarea\3.x.bolen-windows10\build\lib\socket.py", line 528 in socketpair
  File "D:\buildarea\3.x.bolen-windows10\build\lib\asyncio\selector_events.py", line 113 in _make_self_pipe
  File "D:\buildarea\3.x.bolen-windows10\build\lib\asyncio\selector_events.py", line 66 in __init__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\asyncio\events.py", line 660 in new_event_loop
  File "D:\buildarea\3.x.bolen-windows10\build\lib\asyncio\events.py", line 762 in new_event_loop
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\test_asyncio\test_events.py", line 3061 in test_not_implemented_async
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\case.py", line 615 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\case.py", line 663 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\runner.py", line 176 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1883 in _run_suite
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1973 in run_unittest
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\runtest.py", line 175 in test_runner
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\runtest.py", line 179 in runtest_inner
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\runtest.py", line 140 in runtest
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 286 in rerun_failed_tests
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 570 in _main
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 531 in main
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 584 in main
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\__main__.py", line 2 in <module>
  File "D:\buildarea\3.x.bolen-windows10\build\lib\runpy.py", line 85 in _run_code
  File "D:\buildarea\3.x.bolen-windows10\build\lib\runpy.py", line 193 in _run_module_as_main
program finished with exit code 1
elapsedTime=5350.801000
test_not_implemented_async (test.test_asyncio.test_events.AbstractEventLoopTests) ... 

and 

testTimeoutDefault (test.test_socket.NetworkConnectionAttributesTest) ... ok
Unhandled exception in thread started by <bound method ThreadableTest.clientRun of <test.test_socket.NetworkConnectionAttributesTest testMethod=testTimeoutNone>>
Traceback (most recent call last):
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\test_socket.py", line 336, in clientRun
    self.clientTearDown()
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\test_socket.py", line 4752, in clientTearDown
    self.cli.close()
AttributeError: 'NetworkConnectionAttributesTest' object has no attribute 'cli'
Timeout (0:15:00)!
Thread 0x0000184c (most recent call first):
  File "D:\buildarea\3.x.bolen-windows10\build\lib\socket.py", line 212 in accept
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\test_socket.py", line 4757 in _justAccept
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\case.py", line 615 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\case.py", line 663 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 122 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\suite.py", line 84 in __call__
  File "D:\buildarea\3.x.bolen-windows10\build\lib\unittest\runner.py", line 176 in run
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1883 in _run_suite
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\support\__init__.py", line 1973 in run_unittest
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\test_socket.py", line 6032 in test_main
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\runtest.py", line 179 in runtest_inner
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\runtest.py", line 140 in runtest
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 286 in rerun_failed_tests
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 570 in _main
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 531 in main
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\libregrtest\main.py", line 584 in main
  File "D:\buildarea\3.x.bolen-windows10\build\lib\test\__main__.py", line 2 in <module>
  File "D:\buildarea\3.x.bolen-windows10\build\lib\runpy.py", line 85 in _run_code
  File "D:\buildarea\3.x.bolen-windows10\build\lib\runpy.py", line 193 in _run_module_as_main
program finished with exit code 1
elapsedTime=4059.474000