diff --git a/notes-on-testing.md b/notes-on-testing.md
index f36c15d..2dd4180 100644
--- a/notes-on-testing.md
+++ b/notes-on-testing.md
@@ -6,6 +6,8 @@
 [Maibox_coverage_matrix.ods](uploads/6eb0d54b9d22dc1cd5eb870964ee106d/Maibox_coverage_matrix.ods)
 - https://code.briarproject.org/briar/briar/-/issues/2191 will give rise to a few scenarios
 - https://code.briarproject.org/briar/briar/-/issues/2226 also some scenarios when uploads do not complete successfully
+- verify that the messages are not sent to mailbox (own or contat's when contact is online
+- various scenarios of who is online and offline and what happens to messages in each case