Hm, normally there should be a "list of errors" in the 'codingkata'
block - something like:
######################################################
#
# TESTS (total: 8, passed: 1):
#
# (1) EXPECTED '21' FOR [ 8 ] GOT '3'
# (2) EXPECTED '610' FOR [ 15 ] GOT '89'
# (3) EXPECTED '3' FOR [ 4 ] GOT '1'
# (4) EXPECTED '8' FOR [ 6 ] GOT '1'
# (5) EXPECTED '6765' FOR [ 20 ] GOT '987'
# (6) EXPECTED '34' FOR [ 9 ] GOT '5'
# (8) EXPECTED '89' FOR [ 11 ] GOT '13'
#
######################################################
Please check your console / the log.txt (in target/) for this.
I'd also recommend using an IDE (e.g. Netbeans/Eclipse) to execute the
katas, it's easier to view the log.