When jbpm-designer tests are run in Windows environment, many of them fail. You can see the list of failing tests attached in a txt file. They fail with this stacktrace [1]. The wrong URI from the stacktrace can be fixed by putting this code into RepositoryBaseTest class:

protected static final String VFS_REPOSITORY_ROOT =
System.getProperty("os.name").contains("Windows") ?
"default:///" + REPOSITORY_ROOT.replace("
", "/")
: "default://" + REPOSITORY_ROOT;

However this didn't fixed the tests, because many of them still fail at other places. This needs further research. Please let me know if there is a need to help with this. I'm not sure if they test things that shouldn't be run on Windows or so.

[1] http://pastebin.com/QSPDXsbp