diff --git a/layout/reftests/bugs/240029-1-ref.html b/layout/reftests/bugs/240029-1-ref.html
new file mode 100644
index 00000000000..dc5ca019e02
--- /dev/null
+++ b/layout/reftests/bugs/240029-1-ref.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style type="text/css">
+body {
+ font-size: 10px;
+}
+.float {
+ width: 100%;
+ float: left;
+ height: 10px;
+ padding-bottom: 10px;
+}
+table {
+ clear: left;
+}
+</style>
+</head>
+<body>
+<div class="float"></div>
+<br>
+<table cellpadding="0" cellspacing="0">
+ <tr>
+  <td>should_be_at_left_edge</td>
+ </tr>
+</table>
+</body>
+</html>
diff --git a/layout/reftests/bugs/240029-1.html b/layout/reftests/bugs/240029-1.html
new file mode 100644
index 00000000000..7fd60ee9f17
--- /dev/null
+++ b/layout/reftests/bugs/240029-1.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style type="text/css">
+body {
+ font-size: 10px;
+}
+.float {
+ width: 100%;
+ float: left;
+ height: 10px;
+ padding-bottom: 10px;
+}
+</style>
+</head>
+<body>
+<div class="float"></div>
+<br>
+<table cellpadding="0" cellspacing="0">
+ <tr>
+  <td>should_be_at_left_edge</td>
+ </tr>
+</table>
+</body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index 5fd210b01c9..ee154b1d59f 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -169,6 +169,7 @@ fails == 25888-3r.html 25888-3r-ref.html # bug 25888
 == 234964-2.html 234964-2-ref.html
 == 235593-1.html 235593-1-ref.html
 == 236539-1.html 236539-1-ref.html
+== 240029-1.html 240029-1-ref.html
 == 240470-1.html 240470-1-ref.html
 == 243266-1.html 243266-1-ref.html
 == 243302-1.html 243302-1-ref.html
