Comment 4 for bug 397864

I'm going to take a quick look at this, though I should add that I get the same problem as Daniel Bruce when running the tests with both Mock 0.5.0 and Mock 0.6.0:

(djangorecipe)leafhopper:djangorecipe dan$ bin/test
Test-module import failures:

Module: djangorecipe.tests

Traceback (most recent call last):
  File "/Users/dan/.eggs/djangorecipe-0.19.2-py2.6.egg/djangorecipe/tests.py", line 24, in <module>
    class TestRecipe(unittest.TestCase):
  File "/Users/dan/.eggs/djangorecipe-0.19.2-py2.6.egg/djangorecipe/tests.py", line 110, in TestRecipe
    @mock.patch('subprocess', 'Popen')
  File "build/bdist.macosx-10.6-universal/egg/mock.py", line 260, in patch
    raise TypeError("Need a valid target to patch. You supplied: %r" % (target,))
TypeError: Need a valid target to patch. You supplied: 'subprocess'