diff --git a/src/css.js b/src/css.js
index 197cc5722..57d61925e 100644
--- a/src/css.js
+++ b/src/css.js
@@ -632,7 +632,7 @@ if ( jQuery.expr && jQuery.expr.filters ) {
 	jQuery.expr.filters.hidden = function( elem ) {
 		// Support: Opera <= 12.12
 		// Opera reports offsetWidths and offsetHeights less than zero on some elements
-		return elem.offsetWidth <= 0 || elem.offsetHeight <= 0 ||
+		return elem.offsetWidth <= 0 && elem.offsetHeight <= 0 ||
 			(!jQuery.support.reliableHiddenOffsets && ((elem.style && elem.style.display) || jQuery.css( elem, "display" )) === "none");
 	};
 
diff --git a/test/index.html b/test/index.html
index cedbb8282..918d7d2d7 100644
--- a/test/index.html
+++ b/test/index.html
@@ -87,7 +87,7 @@
 	<!-- Test HTML -->
 	<!-- this iframe is outside the #qunit-fixture so it won't reload constantly wasting time, but it means the tests must be "safe" and clean up after themselves -->
 	<iframe id="loadediframe" name="loadediframe" style="display:none;" src="data/iframe.html"></iframe>
-	<dl id="dl" style="position:absolute;top:-32767px;left:-32767px;width:1px;height:1px">
+	<dl id="dl" style="position:absolute;top:-32767px;left:-32767px;width:1px;">
 	<div id="qunit-fixture">
 		<p id="firstp">See <a id="simon1" href="http://simon.incutio.com/archive/2003/03/25/#getElementsBySelector" rel="bookmark">this blog entry</a> for more information.</p>
 		<p id="ap">