diff --git a/maintenance.md b/maintenance.md
index a3dca6f..6e9c17f 100644
--- a/maintenance.md
+++ b/maintenance.md
@@ -17,3 +17,4 @@ Newest entries at the bottom.
 - 2026-09-09: Solar panels cleaned.
 - 2026-09-10: Escape pod batteries charged.
 - 2026-09-10: Debugging duck accounted for.
+- 2026-09-11: Comms backup tested.