'rev' moved to bsdextrautils and TEST-50-DISSECT uses it, so it now
fails:
[ 83.534905] bash[3581]: +++ grep '^now' /proc/timer_list
[ 83.535479] bash[3582]: +++ cut '-d ' -f3
[ 83.535774] bash[3583]: +++ rev
[ 83.535774] bash[3583]: bash: line 1: rev: command not found