diff --git a/layout/reftests/abs-pos/button-1-ref.html b/layout/reftests/abs-pos/button-1-ref.html
new file mode 100644
index 000000000000..a497de452f4e
--- /dev/null
+++ b/layout/reftests/abs-pos/button-1-ref.html
@@ -0,0 +1,28 @@
+<!doctype html>
+<html>
+<head>
+<style>
+.outer {
+position:relative;
+left:0px;
+top:0px;
+width:
+200px;
+height:100px;
+border:none;
+background:#00ff00;
+}
+.inner {
+position:absolute;
+left:0px;
+top:0px;
+width:50px;
+height:50px;
+background:#ff0000;
+}
+</style>
+</head>
+<body>
+<div class=outer><div class=inner></div></div>
+</body>
+</html>
diff --git a/layout/reftests/abs-pos/button-1.html b/layout/reftests/abs-pos/button-1.html
new file mode 100644
index 000000000000..63228fb97bbd
--- /dev/null
+++ b/layout/reftests/abs-pos/button-1.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<html>
+<head>
+<style>
+button {
+position:relative;
+left:0px;
+top:0px;
+width:
+200px;
+height:100px;
+border:none;
+background:#00ff00;
+-moz-appearance: none;
+}
+div {
+position:absolute;
+left:0px;
+top:0px;
+width:50px;
+height:50px;
+background:#ff0000;
+}
+</style>
+</head>
+<body>
+<button><div></div></button>
+</body>
+</html>
diff --git a/layout/reftests/abs-pos/button-2-ref.html b/layout/reftests/abs-pos/button-2-ref.html
new file mode 100644
index 000000000000..fd2cc66af1a3
--- /dev/null
+++ b/layout/reftests/abs-pos/button-2-ref.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<html>
+<head>
+<style>
+div {
+position:relative;
+padding:0;
+background:green;
+width: 200px;
+height: 100px;
+border:none;
+text-align: left;
+font: 12px serif;
+}
+div span {
+display:block;
+position:absolute;
+right:0;
+top:0;
+width:10px;
+height:100%;
+background:red;
+}
+</style>
+</head>
+<body>
+<div>
+<span></span>
+</div>
+</body>
+</html>
diff --git a/layout/reftests/abs-pos/button-2.html b/layout/reftests/abs-pos/button-2.html
new file mode 100644
index 000000000000..4900a29e9802
--- /dev/null
+++ b/layout/reftests/abs-pos/button-2.html
@@ -0,0 +1,32 @@
+<!doctype html>
+<html>
+<head>
+<style>
+button {
+position:relative;
+padding:0;
+background:green;
+width: 200px;
+height: 100px;
+border:none;
+text-align: left;
+font: 12px serif;
+-moz-appearance: none;
+}
+button span {
+display:block;
+position:absolute;
+right:0;
+top:0;
+width:10px;
+height:100%;
+background:red;
+}
+</style>
+</head>
+<body>
+<button>
+<span></span>
+</button>
+</body>
+</html>
diff --git a/layout/reftests/abs-pos/reftest.list b/layout/reftests/abs-pos/reftest.list
index 22ed91e6bb49..2c9054fde5c9 100644
--- a/layout/reftests/abs-pos/reftest.list
+++ b/layout/reftests/abs-pos/reftest.list
@@ -14,3 +14,5 @@
 == select-2.html select-2-ref.html
 == select-3.html select-3-ref.html
 == multi-column-1.html multi-column-1-ref.html
+== button-1.html button-1-ref.html
+== button-2.html button-2-ref.html
