1 files changed, 31 insertions, 0 deletions
diff --git a/layout/reftests/margin-collapsing/block-em-length-1-dyn.html b/layout/reftests/margin-collapsing/block-em-length-1-dyn.html
new file mode 100644
index 0000000000..6a709dd33e
--- /dev/null
+++ b/layout/reftests/margin-collapsing/block-em-length-1-dyn.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<head>
+<style type="text/css">
+body {
+ font-size: 20px;
+}
+#block1 {
+ height: 20px;
+ margin-bottom: 10em;
+ background-color: blue;
+}
+#block2 {
+ height: 20px;
+ margin-top: 5em;
+ background-color: blue;
+}
+</style>
+<script type="text/javascript">
+function test() {
+ document.getElementById('block2').style.fontSize = '50px';
+ document.documentElement.removeAttribute('class');
+}
+document.addEventListener('MozReftestInvalidate', test);
+</script>
+</head>
+<body>
+<div id="block1"></div>
+<div id="block2"></div>
+</body>
+</html>