diff --git a/layout/reftests/bugs/413982-ref.html b/layout/reftests/bugs/413982-ref.html
new file mode 100644
index 00000000000..3e8af90a7e0
--- /dev/null
+++ b/layout/reftests/bugs/413982-ref.html
@@ -0,0 +1,10 @@
+<!DOCTYPE HTML>
+<html lang="en">
+<head>
+    <title>Bug 413982</title>
+</head>
+<body>
+    <div>This is the first line.</div>
+    <div>This is the second line.</div>
+</body>
+</html>
diff --git a/layout/reftests/bugs/413982.html b/layout/reftests/bugs/413982.html
new file mode 100644
index 00000000000..e0502fd0dfb
--- /dev/null
+++ b/layout/reftests/bugs/413982.html
@@ -0,0 +1,25 @@
+<!DOCTYPE HTML>
+<html lang="en">
+<head>
+    <title>Bug 413982</title>
+    <style type="text/css">
+        div.clearboth {
+            clear: both;
+        }
+        div.floatdiv {
+            float: left;
+        }
+        span.innerspan {
+            white-space: nowrap;
+        }
+    </style>
+</head>
+<body>
+    <div class="floatdiv">
+        This is
+        <span class="innerspan"> the first line.
+        </span>
+    </div>
+    <div class="clearboth">This is the second line.</div>
+</body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index 9f006dc805e..57bdcecb5d9 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -696,6 +696,7 @@ random == 403134-1.html 403134-1-ref.html # bug 405377
 == 413840-rtl-offsets.html 413840-rtl-offsets-ref.html
 == 413840-pushed-line-bullet.html 413840-pushed-line-bullet-ref.html
 == 413840-bullet-first-line.html 413840-bullet-first-line-ref.html
+== 413982.html 413982-ref.html
 == 414123.xhtml 414123-ref.xhtml
 == 414851-1.html 414851-1-ref.html
 == 416106-1.xhtml 416106-1-ref.xhtml
