Tests are failing when using `set`

[CharlieEtienne]

Laravel Settings

v3.4.1

Laravel Version

v12.28.1

Bug description

I can't make my tests work. My config is pretty standard. Or maybe it's related to pest 4?

Steps to reproduce

test('it can store and retrieve settings', function () {
    settings()->set('test_a_new_setting', 'My value');
    expect(settings('test_a_new_setting'))->toBe('My value');
});

// returns "Failed asserting that null is identical to 'My value'."