diff --git a/src/grids/tests/manual/responsive.html b/src/grids/tests/manual/responsive.html
index d238122ac..e7bedb54e 100644
--- a/src/grids/tests/manual/responsive.html
+++ b/src/grids/tests/manual/responsive.html
@@ -2,6 +2,7 @@
 <html>
 <head>
     <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>Responsive Grids Tests</title>
 
     <link rel="stylesheet" href="../../../../build/base.css">
