Index: tools/cats/Functional/TestSharing.py
===================================================================
--- tools/cats/Functional/TestSharing.py        (revision 11835)
+++ tools/cats/Functional/TestSharing.py        (working copy)
@@ -98,6 +98,7 @@
             # Note: We don't need a try: here if this raises, the
             # test has already reported success.
             unpublish(collection)
+            collection.delete(recursive=True)
         else:
             self.logger.endAction(False, 'collection is None')