diff --git a/tests/cases/background/position.html b/tests/cases/background/position.html
index f48e3bb..2d53bb7 100644
--- a/tests/cases/background/position.html
+++ b/tests/cases/background/position.html
@@ -41,8 +41,8 @@
   <body>
 
     <div class="medium">
-      <div style="background:url(../../assets/image.jpg) center center;"></div>
-      <div style="background:url(../../assets/image.jpg) repeat-x center center;"></div>
+      <div style='background:url("../../assets/image.jpg") center center;'></div>
+      <div style="background:url('../../assets/image.jpg') repeat-x center center;"></div>
       <div style="background:url(../../assets/image.jpg) repeat-y center center;"></div>
       <div style="background:url(../../assets/image.jpg) no-repeat center center;"></div>
     </div>
