diff --git a/src/gql/mocks/taskData.ts b/src/gql/mocks/taskData.ts
index 50a5c835c5..b18a1985b8 100644
--- a/src/gql/mocks/taskData.ts
+++ b/src/gql/mocks/taskData.ts
@@ -22,6 +22,7 @@ export const taskQuery: TaskQuery = {
       },
       status: TaskStatus.Failed,
       type: "type",
+      diskDevices: [],
     },
     timeTaken: null,
     annotation: null,