Question about CSS Test Suite

I’m writing to ask about spec. test suite samples.

 

I tested some samples on w3c css spec test-suite.

But, I don’t know what is an exact answer of sample.

 

For example, there is a sample “t1606-c562-white-sp-00-b-ag.htm” which

Described as “There should be a single green block below”.

 

I tested it on IE6, FireFox2, Opera9, and many other browsers.

But I can’t find any browser which rendering the page as described.

So, I don’t know what is an exact rendering result.

 

There are so many samples but there are too weak description.

 

Question : All samples on test-suite is tested on what browser ? or It’s a just ideal result description ?

 

I’m looking forward to your favorable reply.

Thank you.