The layout test starts with the content: <blockquote type='cite' id="block">One</blockquote> And pastes this content after the text inside the blockquote: <span><blockquote type='cite'><blockquote type='cite'><div>Two</div><div>Three</div></blockquote></blockquote> The result is the following html: <blockquote type='cite' id="block">One Two <blockquote type='cite'><div>Three</div></blockquote></blockquote> The "Two" should be inside the nested blockquote, not outside of it. This behavior has been in the test results since the test was added in ChangeSet 38273.