Running 

EXTRATESTOPTS='-x test_gdb -uall -v' make testall

Produces:

....
test_csv
test_ctypes
test test_ctypes produced unexpected output:
**********************************************************************
Trying:
    from ctypes import *
Expecting nothing
ok
Trying:
    array = (c_char_p * 5)()
Expecting nothing
ok
Trying:
    print array._objects
Expecting:
    None
ok
Trying:
    array[4] = 'foo bar'
Expecting nothing
ok
Trying:
    array._objects
Expecting:
    {'4': 'foo bar'}
ok
Trying:
    array[4]
Expecting:
    'foo bar'
ok
Trying:
    class X(Structure):
        _fields_ = [("x", c_int), ("y", c_int), ("array", c_char_p * 5)]
Expecting nothing
ok
Trying:
    x = X()
Expecting nothing
ok
Trying:
    print x._objects
Expecting:
    None
ok
Trying:
    print x.array._b_base_ # doctest: +ELLIPSIS
Expecting:
    <ctypes.test.test_objects.X object at 0x...>
ok
Trying:
    x.array[0] = 'spam spam spam'
Expecting nothing
ok
Trying:
    x._objects
Expecting:
    {'0:2': 'spam spam spam'}
ok
Trying:
    x.array._b_base_._objects
Expecting:
    {'0:2': 'spam spam spam'}
ok
2 items had no tests:
    ctypes.test.test_objects.TestCase
    ctypes.test.test_objects.TestCase.test
1 items passed all tests:
  13 tests in ctypes.test.test_objects
13 tests in 3 items.
13 passed and 0 failed.
Test passed.

**********************************************************************
test_curses
.....
test_zipimport
test test_zipimport produced unexpected output:
**********************************************************************
Trying:
    log.append(True)
Expecting nothing
ok
1 items passed all tests:
   1 tests in xyz.txt
1 tests in 1 items.
1 passed and 0 failed.
Test passed.
Trying:
    log.append(True)
Expecting nothing
ok
1 items passed all tests:
   1 tests in xyz.txt
1 tests in 1 items.
1 passed and 0 failed.
Test passed.

**********************************************************************
test_zipimport_support
test_zlib
366 tests OK.
4 tests failed:
    test_ctypes test_urllib2net test_urllibnet test_zipimport
26 tests skipped:
    test_aepack test_al test_applesingle test_bsddb test_bsddb185
    test_bsddb3 test_cd test_cl test_curses test_dl test_gl
    test_imageop test_imgfile test_kqueue test_linuxaudiodev
    test_macos test_macostools test_msilib test_ossaudiodev
    test_pep277 test_scriptpackages test_startfile test_sunaudiodev
    test_winreg test_winsound test_zipfile64
2 skips unexpected on linux2:
    test_bsddb test_bsddb3

Clearly the test_ctypes and the test_zipimport are not failing but the test suite thinks so. In fact, rerunning without the -v let them succeed.