LayoutTests/fast/layoutformattingcontext/block-only/block-root-top-should-start-from-float-top-expected.html

<!-- webkit-test-runner [ LayoutFormattingContextEnabled=true LayoutFormattingContextIntegrationEnabled=false ] -->
<style>
div {
    width: 300px;
    height: 400px;
    background-color: green; 
}
</style>
<div></div>