diff --git a/console/testdata/preload.js b/console/testdata/preload.js
index 556793970f..720418f42a 100644
--- a/console/testdata/preload.js
+++ b/console/testdata/preload.js
@@ -1 +1 @@
-var preloaded = "some-preloaded-string";
+let preloaded = "some-preloaded-string";
\ No newline at end of file