Add unittest directory discovery.

celery/tests/__init__.py

@@ -0,0 +1,4 @@
+from djangox.test.depth import alltests
+
+def suite():
+    return alltests(__file__, __name__)

setup.py

@@ -32,6 +32,7 @@ setup(
     scripts=["celery/bin/celeryd"],
     zip_safe=False,
     install_requires=[
+        'django-unittest-depth',
         'simplejson',
         'carrot',
         'django',