on insert rule with default value

My rule below does not insert the the same uuid value into the test_log
table as is created in the test table when I insert a new value. I know
I've worked through this before, but I'm not remembering why this is.
What's a right way to do this?

create table test (
anid
uuid
not null
default encode( gen_random_bytes( 16 ), 'hex' )::uuid
primary key,
value
text
);

create table test_log (
anid
uuid,
value
text,
op
text,
attime
timestamp with time zone
);

create rule test_rule_a as
on insert to test do (
insert into test_log ( anid, value, op, attime )
values ( new.anid, new.value, 'insert', now() )
);

--
Ron Peterson
Network & Systems Administrator
Mount Holyoke College
http://www.mtholyoke.edu/~rpeterso