diff --git a/test/data/css/cssWidthBeforeDocReady.html b/test/data/css/cssWidthBeforeDocReady.html
index f451f63c8..12e954dc0 100644
--- a/test/data/css/cssWidthBeforeDocReady.html
+++ b/test/data/css/cssWidthBeforeDocReady.html
@@ -5,7 +5,6 @@
 	<style>
 		#test {
 			-webkit-box-sizing: border-box;
-			-moz-box-sizing: border-box;
 			box-sizing: border-box;
 			width: 100px;
 			height: 100px;