diff --git a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
index d1bb1e3..efdb851 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
@@ -116,7 +116,7 @@
    *
    * @var boolean
    */
-  protected $verbose = FALSE;
+  public $verbose = FALSE;
 
   /**
    * Incrementing identifier for verbose output filenames.
@@ -744,7 +744,7 @@ public function run(array $methods = array()) {
     $simpletest_config = \Drupal::config('simpletest.settings');
 
     $class = get_class($this);
-    if ($simpletest_config->get('verbose')) {
+    if ($this->verbose || $simpletest_config->get('verbose')) {
       // Initialize verbose debugging.
       $this->verbose = TRUE;
       $this->verboseDirectory = PublicStream::basePath() . '/simpletest/verbose';
@@ -916,6 +916,8 @@ protected function prepareEnvironment() {
       drupal_valid_test_ua($this->databasePrefix);
     }
 
+    $this->globalConfig = GlobalConfig::getInstance();
+
     // Backup current in-memory configuration.
     $this->originalSettings = settings()->getAll();
     $this->originalConfig = $this->globalConfig->getAll();
@@ -969,8 +971,6 @@ protected function prepareEnvironment() {
     // Create and set new configuration directories.
     $this->prepareConfigDirectories();
 
-    $this->globalConfig = GlobalConfig::getInstance();
-
     // Reset statics before the old container is replaced so that objects with a
     // __destruct() method still have access to it.
     // @todo: Remove once they have been converted to services.
diff --git a/core/scripts/run-tests.sh b/core/scripts/run-tests.sh
index 9538c96..8a7c0e2 100755
--- a/core/scripts/run-tests.sh
+++ b/core/scripts/run-tests.sh
@@ -6,7 +6,6 @@
 
 require_once __DIR__ . '/../vendor/autoload.php';
 
-use Drupal\Core\Config\GlobalConfig;
 use Drupal\Core\StreamWrapper\PublicStream;
 
 const SIMPLETEST_SCRIPT_COLOR_PASS = 32; // Green.
@@ -496,13 +495,9 @@ function simpletest_script_run_one_test($test_id, $test_class) {
     $container = \Drupal::getContainer();
     $container->set('request', $request);
 
-    // Override configuration according to command line parameters.
-    $config = GlobalConfig::getInstance();
-    $config->set('simpletest.settings', 'verbose', $args['verbose']);
-    $config->set('simpletest.settings', 'clear_results', !$args['keep-results']);
-
     $test = new $test_class($test_id);
     $test->dieOnFail = (bool) $args['die-on-fail'];
+    $test->verbose = (bool) $args['verbose'];
     $test->run();
     $info = $test->getInfo();