portal/app/tests/TestCase.php

<?php

namespace Tests;

use Illuminate\Foundation\Testing\TestCase as BaseTestCase;

abstract class TestCase extends BaseTestCase
{
    protected function setUp(): void
    {
        parent::setUp();

        // Quirk 72: supplier code (SupplierPortalClient::loadSession,
        // RefreshSupplierSessionJob, CsvReconcileJob, RouteSupplierLeadJob)
        // hardcodes Cache::store('redis'), bypassing phpunit.xml's
        // CACHE_STORE=array. The Redis store is a shared external service —
        // under `pest --parallel` every worker collides on the global
        // `supplier:session` key, so one worker's afterEach forget()/flush()
        // races another worker's mid-test loadSession(). Repoint the `redis`
        // cache store at the in-process `array` driver: each worker then gets
        // a hermetic, worker-local cache. Production keeps the real `redis`
        // driver — this override only ever runs under APP_ENV=testing.
        config(['cache.stores.redis.driver' => 'array']);
    }
}