Hi Anita,
I just updated to revision 123364...and all tests work:
[junit] Running org.apache.geronimo.tomcat.SecurityTest [junit] Tests run: 4, Failures: 0, Errors: 0, Time elapsed: 8.497 sec
If you can give more information, hopefully I can help you out.
I've just sync'ed the sources and it works for me too (which surprised me a lot as on the other computer it didn't work because of some XML processing stuff).
The most valuable information is in the respective test report files in target/test-reports.
Jacek
