diff --git a/addons/web/static/tests/helpers/mock_server.js b/addons/web/static/tests/helpers/mock_server.js
index ede17917cca..92c051c84bd 100644
--- a/addons/web/static/tests/helpers/mock_server.js
+++ b/addons/web/static/tests/helpers/mock_server.js
@@ -776,7 +776,7 @@ var MockServer = Class.extend({
         var field = args.field ? args.field : 'sequence';
         var records = this.data[args.model].records;
         for (var i in args.ids) {
-            var record = _.findWhere(this.data[args.model].records, {id: args.ids[i]});
+            var record = _.findWhere(records, {id: args.ids[i]});
             record[field] = Number(i) + offset;
         }
     },