diff --git a/tests/cases/zindex/z-index18.html b/tests/cases/zindex/z-index18.html
index 0ccf066..080b236 100644
--- a/tests/cases/zindex/z-index18.html
+++ b/tests/cases/zindex/z-index18.html
@@ -64,9 +64,9 @@
 <div id="container" class="jqplot-target" style="position: relative; height: 300px;">
     <div class="base" style="position: absolute; left: 0px; top: 0px;">a</div>
     <div class="base" style="position: absolute; left: 0px; top: 0px;">b</div>
-    <div class="jqplot-series-shadowdiv"style="position: absolute; left: 16px; top: 10px;">c</div>
-    <div class="jqplot-series-shadowdiv" style="position: absolute; left: 16px; top: 10px;">d</div>
-    <div class="jqplot-series-shadowdiv" style="position: absolute; left: 16px; top: 10px;">e</div>
+    <div style="position: absolute; left: 16px; top: 10px;">c</div>
+    <div style="position: absolute; left: 16px; top: 10px;">d</div>
+    <div style="position: absolute; left: 16px; top: 10px;">e</div>
     <div class="div1" style="position: absolute; left: 16px; top: 10px;">f</div>
     <div class="div2" style="position: absolute; left: 16px; top: 10px;">g</div>
     <div class="div3" style="position: absolute; left: 16px; top: 10px;">h</div>