LayoutTests/fast/layoutformattingcontext/block-only/margin-collapse-simple.html - WebKit - Git at Google

 <!DOCTYPE html> <!-- webkit-test-runner [ LayoutFormattingContextEnabled=true InlineFormattingContextIntegrationEnabled=false ] -->
 <html>
 <body>
     <div style="margin: 20px; width: 20px; height: 20px;">
         <div style="margin-top: 20px; width: 20px; height: 20px;"></div>
     </div>
 </body>
 </html>
	<!DOCTYPE html> <!-- webkit-test-runner [ LayoutFormattingContextEnabled=true InlineFormattingContextIntegrationEnabled=false ] -->
	<html>
	<body>
	<div style="margin: 20px; width: 20px; height: 20px;">
	<div style="margin-top: 20px; width: 20px; height: 20px;"></div>
	</div>
	</body>
	</html>