diff --git a/mistral/rpc/clients.py b/mistral/rpc/clients.py
index cb831a924..39e88f17b 100644
--- a/mistral/rpc/clients.py
+++ b/mistral/rpc/clients.py
@@ -61,6 +61,8 @@ def cleanup():
     _EVENT_ENGINE_CLIENT = None
     _NOTIFIER_CLIENT = None
 
+    base.cleanup()
+
 
 def get_engine_client():
     global _ENGINE_CLIENT