diff --git a/tests/background.html b/tests/background.html
index 5cb520c..ef97595 100644
--- a/tests/background.html
+++ b/tests/background.html
@@ -10,7 +10,12 @@
         <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
         <script type="text/javascript" src="test.js"></script>
         <style>
-
+            html {
+                background-color: red;
+            }
+            body {
+                background-color: lime;
+            }
             .small div{
                 width:100px;
                 height:100px;     
@@ -106,4 +111,4 @@
         </div>
 
     </body>
-</html>
\ No newline at end of file
+</html>