diff --git a/core/modules/simpletest/src/TestBase.php b/core/modules/simpletest/src/TestBase.php
index 944810a..30a6a93 100644
--- a/core/modules/simpletest/src/TestBase.php
+++ b/core/modules/simpletest/src/TestBase.php
@@ -11,9 +11,6 @@ use Drupal\Core\Site\Settings;
 use Drupal\Core\StreamWrapper\PublicStream;
 use Drupal\Core\Test\TestDatabase;
 use Drupal\Core\Utility\Error;
-use Drupal\Tests\ConfigTestTrait;
-use Drupal\Tests\RandomGeneratorTrait;
-use Drupal\Tests\SessionTestTrait;
 
 /**
  * Base class for Drupal tests.
@@ -22,14 +19,7 @@ use Drupal\Tests\SessionTestTrait;
  */
 abstract class TestBase {
 
-  use SessionTestTrait;
-  use RandomGeneratorTrait;
   use AssertHelperTrait;
-  // For backwards compatibility switch the visbility of the methods to public.
-  use ConfigTestTrait {
-    configImporter as public;
-    copyConfig as public;
-  }
 
   /**
    * The test run ID.