Almost all buildbots have failed due to this issue. It seems that is fixed now:

❯ ./python.exe -m test -v test_urllib2net -u all
== CPython 3.8.0a2+ (heads/master:d5a551c269, Feb 27 2019, 09:17:08) [Clang 10.0.0 (clang-1000.10.44.4)]
== macOS-10.14.3-x86_64-i386-64bit little-endian
== cwd: /Users/pgalindo3/github/cpython/build/test_python_15573
== CPU count: 8
== encodings: locale=UTF-8, FS=utf-8
Run tests sequentially
0:00:00 load avg: 2.02 [1/1] test_urllib2net
test_close (test.test_urllib2net.CloseSocketTest) ... ok
test_custom_headers (test.test_urllib2net.OtherNetworkTests) ... ok
test_file (test.test_urllib2net.OtherNetworkTests) ... ok
test_ftp (test.test_urllib2net.OtherNetworkTests) ... ok
test_redirect_url_withfrag (test.test_urllib2net.OtherNetworkTests) ... ok
test_sites_no_connection_close (test.test_urllib2net.OtherNetworkTests) ... skipped 'XXX: http://www.imdb.com is gone'
test_urlwithfrag (test.test_urllib2net.OtherNetworkTests) ... ok
test_ftp_basic (test.test_urllib2net.TimeoutTest) ... ok
test_ftp_default_timeout (test.test_urllib2net.TimeoutTest) ... ok
test_ftp_no_timeout (test.test_urllib2net.TimeoutTest) ... ok
test_ftp_timeout (test.test_urllib2net.TimeoutTest) ... ok
test_http_basic (test.test_urllib2net.TimeoutTest) ... ok
test_http_default_timeout (test.test_urllib2net.TimeoutTest) ... ok
test_http_no_timeout (test.test_urllib2net.TimeoutTest) ... ok
test_http_timeout (test.test_urllib2net.TimeoutTest) ... ok

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

Ran 15 tests in 9.531s

OK (skipped=1)

== Tests result: SUCCESS ==

1 test OK.

Total duration: 10 sec 17 ms
Tests result: SUCCESS

I am going to re-trigger a build in all affected buildbots.