diff --git a/busy-on-matrix.sh b/busy-on-matrix.sh
index f3ca2da..0b7aa17 100644
--- a/busy-on-matrix.sh
+++ b/busy-on-matrix.sh
@@ -13,7 +13,7 @@ FREE_STATE="I am available now"
 TARGET_STATE=""
 
 # Room to test for what the current state is.
-TEST_ROOM="<url-encoded matrix room>"
+TEST_ROOM="<url-encoded matrix room to be used for testing>"
 MATRIX_SERVER="<matrix server where your log in (e.g. https://matrix.org)>"
 
 ACCESS_TOKEN="<an access token for one of your sessions>"
@@ -27,7 +27,9 @@ declare -A ROOM_LIST
 
 ## The ROOM_LIST is a bash array of room identifiers, each in the
 ## format of [<label>]=<url-encoded matrix room id>. The label is just
-## to help you manage this list. The list below is just an example.
+## to help you manage this list. This list *must* include your test
+## room, as this is needed for querying your current state. The list
+## below is just an example.
 
 ROOM_LIST=([MatrixHQ]=%21OGEhHVWSdvArJzumhm:matrix.org
            [SynapseAdmins]=%21ehXvUhWNASUkSLvAGP:matrix.org