The test_urllib2_localnet test fails when run with a clean build from a clean checkout.

Machine:
Ubuntu 12.04 LTS, 64 bit
Intel  i3-2370M CPU @ 2.40GHz × 4 

Test output:

$ ./python -m test -v test_urllib2_localnet
== CPython 3.4.0a0 (default:53cc3dbb1918, Mar 27 2013, 21:05:11) [GCC 4.6.3]
==   Linux-3.2.0-29-generic-x86_64-with-debian-wheezy-sid little-endian
==   /home/mark/repositories/cpython/build/test_python_4588
Testing with flags: sys.flags(debug=0, inspect=0, interactive=0, optimize=0, dont_write_bytecode=0, no_user_site=0, no_site=0, ignore_environment=0, verbose=0, bytes_warning=0, quiet=0, hash_randomization=1)
[1/1] test_urllib2_localnet
test_proxy_qop_auth_int_works_or_throws_urlerror (test.test_urllib2_localnet.ProxyAuthTests) ... ok
test_proxy_qop_auth_works (test.test_urllib2_localnet.ProxyAuthTests) ... ok
test_proxy_with_bad_password_raises_httperror (test.test_urllib2_localnet.ProxyAuthTests) ... ok
test_proxy_with_no_password_raises_httperror (test.test_urllib2_localnet.ProxyAuthTests) ... ok
test_200 (test.test_urllib2_localnet.TestUrlopen) ... ok
test_200_with_parameters (test.test_urllib2_localnet.TestUrlopen) ... ok
test_404 (test.test_urllib2_localnet.TestUrlopen) ... ok
test_bad_address (test.test_urllib2_localnet.TestUrlopen) ... FAIL
test_basic (test.test_urllib2_localnet.TestUrlopen) ... ok
test_chunked (test.test_urllib2_localnet.TestUrlopen) ... ok
test_geturl (test.test_urllib2_localnet.TestUrlopen) ... ok
test_https (test.test_urllib2_localnet.TestUrlopen) ... stopping HTTPS server
joining HTTPS thread
ok
test_https_sni (test.test_urllib2_localnet.TestUrlopen) ... stopping HTTPS server
joining HTTPS thread
ok
test_https_with_cadefault (test.test_urllib2_localnet.TestUrlopen) ... stopping HTTPS server
Got an error:
[SSL: TLSV1_ALERT_UNKNOWN_CA] tlsv1 alert unknown ca (_ssl.c:555)
joining HTTPS thread
ok
test_https_with_cafile (test.test_urllib2_localnet.TestUrlopen) ... Got an error:
[SSL: TLSV1_ALERT_UNKNOWN_CA] tlsv1 alert unknown ca (_ssl.c:555)
stopping HTTPS server
joining HTTPS thread
stopping HTTPS server
joining HTTPS thread
ok
test_info (test.test_urllib2_localnet.TestUrlopen) ... ok
test_iteration (test.test_urllib2_localnet.TestUrlopen) ... ok
test_line_iteration (test.test_urllib2_localnet.TestUrlopen) ... ok
test_redirection (test.test_urllib2_localnet.TestUrlopen) ... ok
test_sending_headers (test.test_urllib2_localnet.TestUrlopen) ... ok

======================================================================
FAIL: test_bad_address (test.test_urllib2_localnet.TestUrlopen)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/mark/repositories/cpython/Lib/test/test_urllib2_localnet.py", line 568, in test_bad_address
    "http://sadflkjsasf.i.nvali.d./")
AssertionError: OSError not raised by urlopen

----------------------------------------------------------------------
Ran 20 tests in 1.080s

FAILED (failures=1)
Warning -- threading._dangling was modified by test_urllib2_localnet
test test_urllib2_localnet failed
1 test failed:
    test_urllib2_localnet