diff --git a/test/encryption/encrypt_decrypt_room_message_test.dart b/test/encryption/encrypt_decrypt_room_message_test.dart
index 1a941f83..d1abab37 100644
--- a/test/encryption/encrypt_decrypt_room_message_test.dart
+++ b/test/encryption/encrypt_decrypt_room_message_test.dart
@@ -84,6 +84,7 @@ void main() {
         room: room,
         originServerTs: now,
         eventId: '\$event',
+        senderId: '@alice:example.com',
       );
       final decryptedEvent =
           await client.encryption.decryptRoomEvent(roomId, encryptedEvent);