message: set a room alias for a public room, as required now
diff: @@ -25,7 +25,7 @@ module.exports = async function roomDirectoryScenarios(alice, bob) {
  console.log(" creating a public room and join through directory:");
  const room = 'test';
  await createRoom(alice, room);
  - await changeRoomSettings(alice, {directory: true, visibility: "public_no_guests"});
  + await changeRoomSettings(alice, {directory: true, visibility: "public_no_guests", alias: "#test"});
  await join(bob, room); //looks up room in directory
  const bobMessage = "hi Alice!";
  await sendMessage(bob, bobMessage);
  