<!-- webkit-test-runner [ LayoutFormattingContextEnabled=true LayoutFormattingContextIntegrationEnabled=false ] -->
<style>
div {
  width: 300px;
  height: 60px;
  background-color: green;
  margin-top: 40px;
}
body { 
  padding: 1px;
}
</style>
<div></div>
<div></div>
<div></div>
</div>