diff --git a/lib/Layout.js b/lib/Layout.js
index 6ca1f1a..9a18786 100644
--- a/lib/Layout.js
+++ b/lib/Layout.js
@@ -133,6 +133,7 @@
 'use strict';
 
 let Buffer;
+/* istanbul ignore if */
 if ('undefined' !== typeof window && 'undefined' !== typeof window.Buffer) {
   Buffer = window.Buffer;
 } else {