diff --git a/embedding/embedlite/tests/content/embedScrollStyles.css b/embedding/embedlite/tests/content/embedScrollStyles.css
index ab8318477dff..e84ce906fdd4 100644
--- a/embedding/embedlite/tests/content/embedScrollStyles.css
+++ b/embedding/embedlite/tests/content/embedScrollStyles.css
@@ -7,6 +7,8 @@
 
 html,
 body {
+    margin: 0;
+    padding: 0;
     font-family: sans-serif;
     -moz-text-size-adjust: none;
 }