an XFail test is a test that fails, but we keep it anyways because we expect it to pass someday once the code is fixed.  In this case, I don't think it probably makes sense as it will be pretty difficult to even figure out what the test result *should* be until the bugs are fixed.  Here is an example of an XFAIL test.

https://github.com/ipython/ipython/wiki/IPEP-5:-Notebook-JavaScript-organization