Now we have a stand-alone server which can provide services for more than one backend at the same time

moto/core/models.py

@@ -110,6 +110,13 @@ class BaseBackend(object):
 
         return paths
 
+    @property
+    def url_bases(self):
+        """
+        A list containing the url_bases extracted from urls.py
+        """
+        return self._url_module.url_bases
+
     @property
     def flask_paths(self):
         """