$ hg clone http://hg.python.org/cpython
$ ./configure --with-pydebug && make -j2
$ ./python -m test
354 tests OK.
1 test altered the execution environment:
    test_multiprocessing
22 tests skipped:
    test_codecmaps_cn test_codecmaps_hk test_codecmaps_jp
    test_codecmaps_kr test_codecmaps_tw test_curses test_devpoll
    test_kqueue test_lzma test_msilib test_ossaudiodev test_smtpnet
    test_socketserver test_startfile test_timeout test_tk
    test_ttk_guionly test_urllibnet test_winreg test_winsound
    test_xmlrpc_net test_zipfile64

$ cd ~/src/
$ hg clone https://bitbucket.org/ned/coveragepy
$ cd /path/to/cpython
$ ./python ~/src/coveragepy/ run --pylib Lib/test/regrtest.py
318 tests OK.
5 tests failed:
    test_frame test_importlib test_super test_threading_local
    test_xml_etree
32 tests altered the execution environment:
    test_asynchat test_asyncore test_bz2 test_capi
    test_concurrent_futures test_ctypes test_decimal test_docxmlrpc
    test_fork1 test_ftplib test_gc test_hashlib test_httplib
    test_httpservers test_io test_json test_logging
    test_multiprocessing test_os test_poplib test_pydoc test_queue
    test_sched test_smtplib test_socket test_sqlite test_ssl test_sys
    test_telnetlib test_threaded_import test_threadedtempfile
    test_threading
22 tests skipped:
    test_codecmaps_cn test_codecmaps_hk test_codecmaps_jp
    test_codecmaps_kr test_codecmaps_tw test_curses test_devpoll
    test_kqueue test_lzma test_msilib test_ossaudiodev test_smtpnet
    test_socketserver test_startfile test_timeout test_tk
    test_ttk_guionly test_urllibnet test_winreg test_winsound
    test_xmlrpc_net test_zipfile64