<!DOCTYPE html>
<style>
.container {
    width: 200px;
    height: 100px;
    font: 100px/1 Ahem, sans-serif;
    background-color: green;
    margin-bottom: 50px;
    color: green;
}
</style>
<body>
    <p>If a shape on a stacked float does not affect the line, then the line should be affected by the shape on the previous stacked float.</p>
    <p>You should see two green rectanges. There should be no red.</p>
    <div class="container">
    </div>
    <div class="container">
    </div>
</body>