diff --git a/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php b/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php
index 38ee14fbd5..16e4c5b10d 100644
--- a/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/SessionConfigurationTest.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\Tests\Core\Session;
 
+use Drupal\Core\Site\Settings;
 use Drupal\Tests\UnitTestCase;
 use Symfony\Component\HttpFoundation\Request;
 
@@ -11,6 +12,15 @@
  */
 class SessionConfigurationTest extends UnitTestCase {
 
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    new Settings([
+      'hash_salt' => $this->randomMachineName(),
+    ]);
+  }
+
   /**
    * Constructs a partially mocked SUT.
    *