Giving descriptive test names to Mojolicious tests?

I'm tidying up my Mojolicious tests and giving them properly descriptive names. As an example:

$t->get_ok( '/api/ninjablock', 'Run a GET against /api/ninjablock with no credentials' )
     ->status_is( 403, '  and it has correctly returned a 403' );

The test output looks like this, however:

ok 1 - GET /api/ninjablock
ok 2 -   and it has correctly returned a 403

I assume I'm missing something obvious, but how do I make that first test show something other than GET /api/ninjablock as the name?