While running the effects-unit-tests browsers generate a bunch of http-requests which always fail with a http statuscode of 404 while requesting a specific image (this doesn't affect the unit-test, as they still succeed).

The requests originate from some of the effects tests adding divs with class ''box'' to a div with id ''fx-tests'' in ''test/index.html'' (see ''makeTest'' function defined in ''test/unit/effect.js'' around line 604).

In ''test/data/testsuite.css'' there is a style defined for ''div#fx-tests div.box'' but the url for the background image is invalid. Changing ''testsuite.css'' from

Line 13: background: red url(data/cow.jpg) no-repeat;

to

Line 13: background: red url(cow.jpg) no-repeat;

fixes the invalid url and failing http-requests as now the image is found. Or if the background-image isn't really needed the url could be removed altogether and thus saving a few requests