why my bb does no work?

output.txt

1..3
ok 1 - should be 1
not ok 2 - should be 2
#   Failed test 'should be 2'
#   at untitled line 8.
#          got: undef
#     expected: '2'
# Looks like you failed 1 test of 3.
ok 3 - should be 3

test_glob_my.t

use Test::More tests => 3;

$aa       = 1;
my $bb    = 2;   # HERE!
local $cc = 3;

is(${*aa}, 1, "should be 1");
is(${*bb}, 2, "should be 2");
is(${*cc}, 3, "should be 3");