wicketTester does not find HTML mark-up if custom location is used.

If a custom HTML mark-up location is used as described in the ApacheWicket Wiki the wicketTester does not find mark-up to render pages.

refer to:
http://cwiki.apache.org/WICKET/control-where-html-files-are-loaded-from.html#ControlwhereHTMLfilesareloadedfrom-InWicket1.3

Nevertheless running the application with ApacheTomcat 6.0.16 everything renders fine.

Remark:
wicketTester has been instanciated using custom test application extended from the application used, overriding newSession for different purpose.