diff --git a/mailbox-test-coverage.md b/mailbox-test-coverage.md
index eeb9879..e6e7331 100644
--- a/mailbox-test-coverage.md
+++ b/mailbox-test-coverage.md
@@ -22,7 +22,7 @@
 | https://code.briarproject.org/briar/briar-mailbox/-/issues/13 | Add Hilt |Closed | n/a | ------ | ------ | ------ | ------ |
 | https://code.briarproject.org/briar/briar-mailbox/-/issues/14 | Clarify (Decide?) License | Closed | n/a | ------ | ------ | ------ | ------ |
 | https://code.briarproject.org/briar/briar-mailbox/-/issues/15 | Decide about database library | Closed | n/a | ------ | ------ | ------ | ------ |
-| ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ |
+| https://code.briarproject.org/briar/briar-mailbox/-/issues/16 | Research and decide database library | Closed | n/a | ------ | ------ | ------ | ------ |
 | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ |
 | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ |
 | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ |