doc test fails with egg

The tests tries to load the README file, even if it is inside an egg. It seems testtools now builds an egg before doing the testing.

$ make check
PYTHONPATH=/tmp/testscenarios/0.4/lib: python -m testtools.run \
    testscenarios.test_suite
Traceback (most recent call last):
  File "/usr/lib64/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib64/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/lib/python2.7/site-packages/testtools/run.py", line 399, in <module>
    main(sys.argv, sys.stdout)
  File "/usr/lib/python2.7/site-packages/testtools/run.py", line 396, in main
    stdout=stdout)
  File "/usr/lib/python2.7/site-packages/testtools/run.py", line 206, in __init__
    self.parseArgs(argv)
  File "/usr/lib/python2.7/site-packages/testtools/run.py", line 283, in parseArgs
    self.createTests()
  File "/usr/lib/python2.7/site-packages/testtools/run.py", line 292, in createTests
    self.module)
  File "/usr/lib64/python2.7/unittest/loader.py", line 128, in loadTestsFromNames
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib64/python2.7/unittest/loader.py", line 113, in loadTestsFromName
    test = obj()
  File "build/bdist.linux-x86_64/egg/testscenarios/__init__.py", line 71, in test_suite
  File "build/bdist.linux-x86_64/egg/testscenarios/tests/__init__.py", line 29, in test_suite
  File "build/bdist.linux-x86_64/egg/testscenarios/tests/__init__.py", line 42, in load_tests
  File "/usr/lib64/python2.7/doctest.py", line 2514, in DocFileSuite
    suite.addTest(DocFileTest(path, **kw))
  File "/usr/lib64/python2.7/doctest.py", line 2433, in DocFileTest
    doc, path = _load_testfile(path, package, module_relative)
  File "/usr/lib64/python2.7/doctest.py", line 215, in _load_testfile
    file_contents = package.__loader__.get_data(filename)
IOError: [Errno 2] No such file or directory: 'testscenarios/tests/../../../README'

The problematic code in question is in lib/testscenarios/tests/__init__.py line 42

    standard_tests.addTest(
        doctest.DocFileSuite("../../../README", optionflags=doctest.ELLIPSIS))