$ ./python -We -m test -v -m test__register_task_3 test_asyncio
...
======================================================================
ERROR: test__register_task_3 (test.test_asyncio.test_tasks.CIntrospectionTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/serhiy/py/cpython/Lib/test/test_asyncio/test_tasks.py", line 2616, in test__register_task_3
    self.assertEqual(asyncio.Task.all_tasks(loop), {task})
PendingDeprecationWarning: Task.all_tasks() is deprecated, use asyncio.all_tasks() instead

======================================================================
ERROR: test__register_task_3 (test.test_asyncio.test_tasks.PyIntrospectionTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/serhiy/py/cpython/Lib/test/test_asyncio/test_tasks.py", line 2616, in test__register_task_3
    self.assertEqual(asyncio.Task.all_tasks(loop), {task})
PendingDeprecationWarning: Task.all_tasks() is deprecated, use asyncio.all_tasks() instead

----------------------------------------------------------------------

And the test is failed if run with -We.

Any chance we can get this fixed for 3.7.0rc1?

FWIW, as of current 3.7 head (cebd4b009adca6611e92eb337747f59818e941a6), I am also seeing the following warnings (on macOS 10.13):

./bin/python3.7 -m test -w -uall,-largefile -j3 test_asyncio
Run tests in parallel using 3 child processes
running: test_asyncio (30 sec)
0:00:47 load avg: 1.74 [1/1] test_asyncio passed (47 sec)
.../python3.7/test/test_asyncio/test_sslproto.py:602: ResourceWarning: unclosed <ssl.SSLSocket fd=12, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 62863), raddr=('127.0.0.1', 62864)>
  pass
.../python3.7/test/test_asyncio/functional.py:272: ResourceWarning: unclosed <socket.socket fd=13, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 62871), raddr=('127.0.0.1', 62872)>
  self._prog(TestSocketWrapper(sock))
.../python3.7/asyncio/sslproto.py:322: ResourceWarning: unclosed transport <asyncio.sslproto._SSLProtocolTransport object at 0x10e092e90>
  source=self)
.../python3.7/test/test_asyncio/test_tasks.py:2612: PendingDeprecationWarning: Task.all_tasks() is deprecated, use asyncio.all_tasks() instead
  self.assertEqual(asyncio.Task.all_tasks(loop), {task})
.../python3.7/test/test_asyncio/test_tasks.py:2612: PendingDeprecationWarning: Task.all_tasks() is deprecated, use asyncio.all_tasks() instead
  self.assertEqual(asyncio.Task.all_tasks(loop), {task})

== Tests result: SUCCESS ==

1 test OK.

Working on it

That's a duplicate of bpo-33789: I fixed it yesterday in the master branch.

Master already has the fix, added by 7ed61e9431e

Aha, I see.
Thanks

Andrew Svetlov: "Aha, I see. Thanks"

You're welcome.

Ned Deily: "Any chance we can get this fixed for 3.7.0rc1?"

I just backported my changes to the 3.7 branch.