diff --git a/layout/reftests/bugs/387201-1-ref.html b/layout/reftests/bugs/387201-1-ref.html
new file mode 100644
index 000000000000..bcd40d8aeb9b
--- /dev/null
+++ b/layout/reftests/bugs/387201-1-ref.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<style type="text/css">
+.i {
+  height: 10px;
+  float: left;
+}
+</style>
+</head>
+<body>
+
+<div style="width: 4px;">
+  <div style="margin-left: 10px;">
+
+    <div class="i" style="border: 1px solid green">2</div>
+  </div>
+</div>
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/387201-1.html b/layout/reftests/bugs/387201-1.html
new file mode 100644
index 000000000000..103f617b63f2
--- /dev/null
+++ b/layout/reftests/bugs/387201-1.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<style type="text/css">
+.i {
+  height: 10px;
+  float: left;
+}
+</style>
+</head>
+<body>
+
+<div style="width: 4px;">
+  <div style="margin-left: 10px;">
+    <div class="i"></div>
+    <div class="i" style="border: 1px solid green">2</div>
+  </div>
+</div>
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/387201-2.html b/layout/reftests/bugs/387201-2.html
new file mode 100644
index 000000000000..e3b4ca996bee
--- /dev/null
+++ b/layout/reftests/bugs/387201-2.html
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style>
+#mlinks {
+	padding: 0;
+	float: right;
+}
+#hticker {
+	clear: both;
+}
+</style>
+</head>
+<body>
+<ul id="mlinks"></ul>
+<div id="hticker"></div>
+</body>
+</html>
diff --git a/layout/reftests/bugs/387201-3.html b/layout/reftests/bugs/387201-3.html
new file mode 100644
index 000000000000..f0d578de80f8
--- /dev/null
+++ b/layout/reftests/bugs/387201-3.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<head>
+</head>
+<body>
+
+<div style="display: table-footer-group;">
+  <div style="float: right; width: 10px; height: 10px; padding-left: 40px;"></div>
+  <div style="-moz-float-edge: margin-box;">
+    <div style="float: right; height: 18px; width: 0px;"></div>
+  </div>
+</div>
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index 9ab507652d07..45c8400c4e3d 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -332,6 +332,9 @@ random-if(MOZ_WIDGET_TOOLKIT=="cocoa") == 379316-2.html 379316-2-ref.html # bug
 == 386470-1b.html 386470-1-ref.html
 == 386470-1c.html 386470-1-ref.html
 == 386920-1.html 386920-1-ref.html
+== 387201-1.html 387201-1-ref.html
+== 387201-2.html about:blank  # Really an assertion test rather than a rendering test
+== 387201-3.html about:blank  # Really an assertion test rather than a rendering test
 == 387344-1.html 387344-1-ref.html
 == 389924-1a.html 389924-1-ref.html
 == 389924-1b.html 389924-1-ref.html
