ERROR: schema tests is not a member of extension "basejump-supabase_test_helpers"

[eagor]

I'm following the supabase guide, and on this step:

select dbdev.install('basejump-supabase_test_helpers');
create extension if not exists "basejump-supabase_test_helpers" version '0.0.6';

I'm getting error:

Error: ERROR: 55000: schema tests is not a member of extension "basejump-supabase_test_helpers" DETAIL: An extension may only use CREATE ... IF NOT EXISTS to skip object creation if the conflicting object is one that it already owns.

what am I missing here? Thanks 🙏🏽.