`supabase db test` not able to import extra relative file

[franck-ada]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Create file 'supabase/tests/init-function.sql' with content

CREATE
OR REPLACE FUNCTION public.test () RETURNS integerAS $$
BEGIN
 return 1;
END;
$$ LANGUAGE plpgsql;

2. Create file 'supabase/tests/test-sample.sql' with content

BEGIN;

\i init-function.sql
SELECT plan(1);
SELECT ok( 1=1, 'Oups 1!=1');
SELECT * FROM finish();
ROLLBACK;

3. run supabase db test "supabase/tests/test-sample.sql"See error:

psql:XXXXX/tests/test-sample.sql:5: error: init-function.sql: No such file or directory

Expected behavior
We should have the relative import correctly imported

System information
Rerun the failing command with --create-ticket flag.

• Version of OS: Mac OS
• Version of CLI: v2.72.1
• Version of Docker: 29.1.5
• Versions of services:
  SERVICE IMAGE | LOCAL | LINKED
  ------------------------|------------------------|------------
  supabase/postgres | 17.4.1.043 | 17.4.1.043
  supabase/gotrue | v2.179.0 | v2.185.0
  postgrest/postgrest | v12.2.3 | v12.2.3
  supabase/realtime | v2.69.2 | -
  supabase/storage-api | v1.33.5 | v1.33.0
  supabase/edge-runtime | v1.68.4 | -
  supabase/studio | 2026.01.12-sha-4e9b718 | -
  supabase/postgres-meta | v0.95.2 | -
  supabase/logflare | 1.28.0 | -
  supabase/supavisor | 2.7.4 | -

Additional context
Seems that the bug was introduced by:

• fix(db): support arbitrary test directories #4590
• Unable to run supabase test db when using docker-outside-of-docker #4523