diff -Naur networkx-1.9.orig/networkx/tests/test.py networkx-1.9/networkx/tests/test.py

--- networkx-1.9.orig/networkx/tests/test.py	2014-06-25 11:50:58.000000000 -0600

+++ networkx-1.9/networkx/tests/test.py	2014-06-30 12:00:00.000000000 -0600

@@ -2,6 +2,24 @@

 import sys

 from os import path,getcwd

+import pkg_resources

+

+# If there is a conflicting non egg module,

+# i.e. an older standard system module installed,

+# then replace it with this requirement

+def replace_dist(requirement):

+    try:

+        return pkg_resources.require(requirement)

+    except pkg_resources.VersionConflict:

+        e = sys.exc_info()[1]

+        dist=e.args[0]

+        req=e.args[1]

+        if dist.key == req.key and not dist.location.endswith('.egg'):

+            del pkg_resources.working_set.by_key[dist.key]

+            # We assume there is no need to adjust sys.path

+            # and the associated pkg_resources.working_set.entries

+            return pkg_resources.require(requirement)

+

 def run(verbosity=1,doctest=False,numpy=True):

     """Run NetworkX tests.

@@ -16,6 +34,8 @@

     numpy: bool, optional

       True to test modules dependent on numpy

     """

+    replace_dist("nose >= 1.0")

+

     try:

         import nose

     except ImportError: