diff --git a/layout/generic/crashtests/537645.xhtml b/layout/generic/crashtests/537645.xhtml
new file mode 100644
index 000000000000..de3123dc9518
--- /dev/null
+++ b/layout/generic/crashtests/537645.xhtml
@@ -0,0 +1,11 @@
+<html xmlns="http://www.w3.org/1999/xhtml" class="reftest-wait">
+<head>
+<style>
+span { margin: inherit; }
+html, body { -moz-column-width: 1px; column-width: 1px; }
+</style>
+</head>
+<body onload="document.getElementsByTagName('style')[0].setAttribute('foo', 'bar'); document.documentElement.removeAttribute('class');">
+<span><i><spacer /><caption /></i><span><span><div /></span></span></span>
+</body>
+</html>
diff --git a/layout/generic/crashtests/crashtests.list b/layout/generic/crashtests/crashtests.list
index cb2655dd2b06..7a5c4f452e11 100644
--- a/layout/generic/crashtests/crashtests.list
+++ b/layout/generic/crashtests/crashtests.list
@@ -376,6 +376,7 @@ load 534082-1.html
 load 534366-1.html
 load 534366-2.html
 load 536692-1.xhtml
+load 537645.xhtml
 load 541277-1.html
 load 541277-2.html
 load 541714-1.html
