python twisted failure check problem

gistfile1.txt

from twisted.internet.error import ConnectingCancelledError

from twisted.internet.defer import Deferred, CancelledError

# This prints no - it doesn't work

d = Deferred()

def on_error(failure):
    if failure.check([ConnectingCancelledError, CancelledError]):
        print "ok"
    else:
        print "no"
    print failure

d.addErrback(on_error)
d.cancel()

## This one does work - it prints ok

d = Deferred()

def on_error(failure):
    if failure.check(CancelledError):
        print "ok"
    else:
        print "no"
    print failure

d.addErrback(on_error)
d.cancel()