diff --git a/packages/firebase_database/test/firebase_database_test.dart b/packages/firebase_database/test/firebase_database_test.dart
index f154dd3e3f83..8881e5fbe9e9 100755
--- a/packages/firebase_database/test/firebase_database_test.dart
+++ b/packages/firebase_database/test/firebase_database_test.dart
@@ -58,7 +58,9 @@ void main() {
                   ),
                 ),
                 (_) {
-                  updatedValue = channel.codec.decodeEnvelope(_)['value'];
+                  updatedValue = channel.codec
+                      .decodeEnvelope(_)['value']
+                      .cast<String, dynamic>();
                 },
               );
             }