diff --git a/packages/client/ui-conversation/tests/read-card.spec.tsx b/packages/client/ui-conversation/tests/read-card.spec.tsx
index c09bd65133..ae458303e8 100644
--- a/packages/client/ui-conversation/tests/read-card.spec.tsx
+++ b/packages/client/ui-conversation/tests/read-card.spec.tsx
@@ -231,7 +231,7 @@ describe('DetailsPanel Output section (read)', () => {
         phase: 'ready',
       })
     const workspaces = createSnapshotStore<WorkspaceListState>({
-      items: [], state: 'idle', phase: 'ready', error: null,
+      items: [], archivedSessionIds: [], state: 'idle', phase: 'ready', error: null,
       baselinesReady: true, recentWorkspaceId: undefined,
     })
     return render(