diff --git a/mozilla/layout/html/tests/block/bugs/153429a.html b/mozilla/layout/html/tests/block/bugs/153429a.html
new file mode 100644
index 00000000000..2e4af844e98
--- /dev/null
+++ b/mozilla/layout/html/tests/block/bugs/153429a.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+<head>
+  <title>Testcase, bug 153429</title>
+</head>
+<body
+  ><table width="50">
+    <tr>
+      <td
+        ><div style="margin-bottom: -7px"><hr></div
+        ><img src="http://mozilla.org/images/mozilla-banner.gif" width="336" height="80" align="right" alt=""
+        ><span style="font-size: 30px">ARatherLongWord</span
+      ></td>
+    </tr>
+  </table
+></body>
+</html>
diff --git a/mozilla/layout/html/tests/block/bugs/153429b.html b/mozilla/layout/html/tests/block/bugs/153429b.html
new file mode 100644
index 00000000000..21054ddb229
--- /dev/null
+++ b/mozilla/layout/html/tests/block/bugs/153429b.html
@@ -0,0 +1,22 @@
+
+<title>Regression testcase, bug 153429</title>
+<style type="text/css">
+
+div {
+    width: 400px;
+    border: medium solid green;
+}
+
+div > div {
+    width: 380px;
+    height: 4em;
+    float: left;
+    border: medium solid purple;
+}
+
+</style>
+
+<div>
+  <div></div>
+  This is some text.  How does it wrap around the float?
+</div>
diff --git a/mozilla/layout/html/tests/block/bugs/153429c.html b/mozilla/layout/html/tests/block/bugs/153429c.html
new file mode 100644
index 00000000000..5d57c69e5d7
--- /dev/null
+++ b/mozilla/layout/html/tests/block/bugs/153429c.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+<head>
+    <title>Testcase, correctness bug fixed by patch to bug 153429</title>
+    <style type="text/css">
+
+    div {
+        border: medium solid purple;
+        padding: 0.25em;
+        margin: 1px;
+
+    }
+
+    #contain {
+        width: 400px;
+    }
+
+    #one {
+        margin-bottom: 100px;
+    }
+
+    #two {
+        float: left;
+        width: 370px;
+        height: 200px;
+    }
+
+    </style>
+</head>
+<body>
+
+<div id="contain">
+    <div id="one">This <code>div</code> (1) has a 100 px bottom margin.</div>
+    <div id="two">This <code>div</code> (2) is floating left and is 200px tall.</div>
+    This is text that should end up just below <code>div</code> (2) since it
+    can't fit next to it.  There should not be a large gap above it.
+</div>
diff --git a/mozilla/layout/html/tests/block/bugs/file_list.txt b/mozilla/layout/html/tests/block/bugs/file_list.txt
index cd4743945ff..4bf4cb55afb 100644
--- a/mozilla/layout/html/tests/block/bugs/file_list.txt
+++ b/mozilla/layout/html/tests/block/bugs/file_list.txt
@@ -197,6 +197,9 @@ file:///s:/mozilla/layout/html/tests/block/bugs/134580-1.html
 file:///s:/mozilla/layout/html/tests/block/bugs/134580-2.html
 file:///s:/mozilla/layout/html/tests/block/bugs/148245.html
 file:///s:/mozilla/layout/html/tests/block/bugs/151620.html
+file:///s:/mozilla/layout/html/tests/block/bugs/153429a.html
+file:///s:/mozilla/layout/html/tests/block/bugs/153429b.html
+file:///s:/mozilla/layout/html/tests/block/bugs/153429c.html
 file:///s:/mozilla/layout/html/tests/block/bugs/155333-1.html
 file:///s:/mozilla/layout/html/tests/block/bugs/155333-2.html
 file:///s:/mozilla/layout/html/tests/block/bugs/154741.html
diff --git a/mozilla/layout/html/tests/block/bugs/rtest.lst b/mozilla/layout/html/tests/block/bugs/rtest.lst
index 072f5b33193..f669b106e72 100644
--- a/mozilla/layout/html/tests/block/bugs/rtest.lst
+++ b/mozilla/layout/html/tests/block/bugs/rtest.lst
@@ -197,6 +197,9 @@
 134580-2.html
 148245.html
 151620.html
+153429a.html
+153429b.html
+153429c.html
 155333-1.html
 155333-2.html
 154741.html
