Added not declared, but needed test dependency on `zope.testing`.

CHANGES.txt

@@ -5,7 +5,7 @@ CHANGES
 3.11.2 (unreleased)
 -------------------
 
-- ...
+- Added not declared, but needed test dependency on `zope.testing`.
 
 
 3.11.1 (2010-04-30)

setup.py

@@ -63,9 +63,11 @@ setup(name='zope.container',
                               ], include_dirs=['include']),
                    ],
       extras_require=dict(
-          test=['zope.configuration',
-                'zope.security',
-                ]),
+          test=[
+              'zope.configuration',
+              'zope.security',
+              'zope.testing',
+              ]),
       install_requires=['setuptools',
                         'zope.interface',
                         'zope.dottedname',