curses.setupterm() in a doctest

gistfile1.txt

mg@platonas: ~/src/new-zope-order/zope.testrunner [git:master $=] $ cat doctest.txt
>>> import curses
>>> curses.setupterm()

mg@platonas: ~/src/new-zope-order/zope.testrunner [git:master $=] $ python -m doctest doctest.txt 
**********************************************************************
File "doctest.txt", line 2, in doctest.txt
Failed example:
    curses.setupterm()
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python2.7/doctest.py", line 1289, in __run
        compileflags, 1) in test.globs
      File "<doctest doctest.txt[1]>", line 1, in <module>
        curses.setupterm()
    TypeError: argument must be an int, or have a fileno() method.
**********************************************************************
1 items had failures:
   1 of   2 in doctest.txt
***Test Failed*** 1 failures.

[exited with 1]
mg@platonas: ~/src/new-zope-order/zope.testrunner [git:master $=] $ pypy -m doctest doctest.txt 
**********************************************************************
File "doctest.txt", line 2, in doctest.txt
Failed example:
    curses.setupterm()
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/pypy/lib-python/2.7/doctest.py", line 1289, in __run
        compileflags, 1) in test.globs
      File "<doctest doctest.txt[1]>", line 1, in <module>
        curses.setupterm()
      File "/usr/lib/pypy/lib_pypy/_curses.py", line 1102, in setupterm
        fd = sys.stdout.fileno()
    AttributeError: _SpoofOut instance has no attribute 'fileno'
**********************************************************************
1 items had failures:
   1 of   2 in doctest.txt
***Test Failed*** 1 failures.

[exited with 1]
mg@platonas: ~/src/new-zope-order/zope.testrunner [git:master $=] $ python3 -m doctest doctest.txt 
**********************************************************************
File "doctest.txt", line 2, in doctest.txt
Failed example:
    curses.setupterm()
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python3.3/doctest.py", line 1287, in __run
        compileflags, 1), test.globs)
      File "<doctest doctest.txt[1]>", line 1, in <module>
        curses.setupterm()
    io.UnsupportedOperation: fileno
**********************************************************************
1 items had failures:
   1 of   2 in doctest.txt
***Test Failed*** 1 failures.

[exited with 1]

python is 2.7.5+
python3 is 3.3.2+
pypy is 2.0.2

the OS is Ubuntu 13.10