settings.debug.php

<?php
$config['system.logging']['error_level'] = 'verbose';
// See https://gist.github.com/larowlan/5baca05f5be4e5582777a9904ecaec41 for contents.
$settings['container_yamls'][] = DRUPAL_ROOT . '/sites/default/services.local.yml';
$config['system.performance']['js']['preprocess'] = FALSE;
$config['system.performance']['css']['preprocess'] = FALSE;
$settings['cache']['bins']['render'] = 'cache.backend.null';
$settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null';
$settings['extension_discovery_scan_tests'] = TRUE;