When these tests are compared against their actual -ref.html files, they fail: css2.1/20110323/abspos-containing-block-initial-004b.htm css2.1/20110323/abspos-containing-block-initial-004d.htm
These particular tests don't seem to have -ref.html files? https://test.csswg.org/suites/css21_dev/20110323/html4/
<link rel="match" href="abspos-containing-block-initial-004-ref.htm"> We are treating abspos-containing-block-initial-004-ref.htm as a test. This is cleaned up in bug 203784 and bug 204050.
<rdar://problem/69332081>