<!DOCTYPE html>

<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com" />
<meta name="assert" content="When a floating box has a negative margin negative enough that it pushes the float past the top of the block formatting context, it should render properly."/>

<body>
<div style="width: 50px; height: 50px; background: green;"></div>
</body>
