diff --git a/tests/src/Functional/YourExtensionFunctionalTest.php b/tests/src/Functional/YourExtensionFunctionalTest.php
index 26e15915..648684e3 100644
--- a/tests/src/Functional/YourExtensionFunctionalTest.php
+++ b/tests/src/Functional/YourExtensionFunctionalTest.php
@@ -4,6 +4,7 @@
 
 namespace Drupal\Tests\your_extension\Functional;
 
+use Drupal\Core\Session\AccountInterface;
 use Drupal\Tests\BrowserTestBase;
 
 /**
@@ -30,6 +31,9 @@ class YourExtensionFunctionalTest extends BrowserTestBase {
    */
   public function testGetText() {
     $user = $this->createUser(['administer site configuration']);
+    if (!$user instanceof AccountInterface) {
+      throw new \Exception('User could not be created.');
+    }
     $this->drupalLogin($user);
 
     $this->drupalGet('admin/config/development/your-extension');