diff --git a/src/cli/onefuzz/backend.py b/src/cli/onefuzz/backend.py
index 49d423de0..b199c4fb6 100644
--- a/src/cli/onefuzz/backend.py
+++ b/src/cli/onefuzz/backend.py
@@ -348,6 +348,8 @@ def before_sleep(retry_state: RetryCallState) -> None:
 
 
 class ContainerWrapper:
+    client: ContainerClient
+
     def __init__(self, container_url: str) -> None:
         self.client = ContainerClient.from_container_url(container_url)
         self.container_url = container_url