1 files changed, 24 insertions, 0 deletions
diff --git a/layout/reftests/margin-collapsing/block-negative-3a.html b/layout/reftests/margin-collapsing/block-negative-3a.html
new file mode 100644
index 000000000..06883fc39
--- /dev/null
+++ b/layout/reftests/margin-collapsing/block-negative-3a.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style type="text/css">
+html, body {
+ margin: 0; padding: 5px;
+}
+div {
+ height: 20px;
+ background-color: green;
+}
+#positive {
+ margin-bottom: 100px;
+}
+#negative {
+ margin-top: -80px;
+}
+</style>
+</head>
+<body>
+<div id="positive"></div>
+<div id="negative"></div>
+</body>
+</html>