bug#35556: [core-updates] python test suite fails on "test_asyncio"

[T460s laptop]

The error reads as follows:

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======================================================================          
                                                                                
              
ERROR: test_start_tls_server_1 
(test.test_asyncio.test_sslproto.SelectorStartTLSTests)                         
                                                               
----------------------------------------------------------------------          
                                                                                
              
Traceback (most recent call last):                                              
                                                                                
              
  File 
"/tmp/guix-build-python-3.7.2.drv-0/Python-3.7.2/Lib/test/test_asyncio/test_ssl 
                                                                                
       proto.py", line 507, in test_start_tls_server_1                          
                                                                                
                     
    self.loop.run_until_complete(run_main())                                    
                                                                                
              
  File 
"/tmp/guix-build-python-3.7.2.drv-0/Python-3.7.2/Lib/asyncio/base_events.py", l 
                                                                                
       ine 584, in run_until_complete                                           
                                                                                
                     
    return future.result()                                                      
      US                                                                        
              
  File 
"/tmp/guix-build-python-3.7.2.drv-0/Python-3.7.2/Lib/test/test_asyncio/test_ssl 
                                                                                
       proto.py", line 502, in run_main                                         
                                                                                
                     
    loop=self.loop, timeout=self.TIMEOUT)                                       
                                                                                
              
  File "/tmp/guix-build-python-3.7.2.drv-0/Python-3.7.2/Lib/asyncio/tasks.py", 
line 42                                                                         
               3, in wait_for
    raise futures.TimeoutError()
concurrent.futures._base.TimeoutError

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

Ran 2029 tests in 98.143s

FAILED (errors=1, skipped=35)
1 test failed again:
    test_asyncio

== Tests result: FAILURE then FAILURE ==

389 tests OK.

1 test failed:
    test_asyncio

21 tests skipped:
    test_devpoll test_gdb test_ioctl test_kqueue test_msilib test_nis
    test_ossaudiodev test_smtpnet test_socketserver test_startfile
    test_timeout test_tix test_tk test_ttk_guionly test_urllib2net
    test_urllibnet test_winconsoleio test_winreg test_winsound
    test_xmlrpc_net test_zipfile64

1 re-run test:
    test_asyncio

2 tests run no tests:
    test_dtrace test_future4

Total duration: 6 min 34 sec
Tests result: FAILURE then FAILURE
make: *** [Makefile:1074: test] Error 2

Test suite failed, dumping logs.
command "make" "test" "-j" "4" "TESTOPTS=-j4" failed with status 2
builder for `/gnu/store/rbjsdf3vdxbf1b1a8w9cfj77i5knq8hp-python-3.7.2.drv' 
failed with exit code 1
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