diff --git a/extensions/codex/media-understanding-provider.test.ts b/extensions/codex/media-understanding-provider.test.ts
index 8939d9f3e71..af051c4a630 100644
--- a/extensions/codex/media-understanding-provider.test.ts
+++ b/extensions/codex/media-understanding-provider.test.ts
@@ -26,6 +26,7 @@ function threadStartResult() {
   return {
     thread: {
       id: "thread-1",
+      sessionId: "session-1",
       forkedFromId: null,
       preview: "",
       ephemeral: true,