diff --git a/tests/src/Functional/RedirectFormTest.php b/tests/src/ExistingSite/RedirectFormTest.php
similarity index 67%
rename from tests/src/Functional/RedirectFormTest.php
rename to tests/src/ExistingSite/RedirectFormTest.php
index 9bf99baf0..55aa13e28 100644
--- a/tests/src/Functional/RedirectFormTest.php
+++ b/tests/src/ExistingSite/RedirectFormTest.php
@@ -2,57 +2,36 @@
 
 declare(strict_types=1);
 
-namespace src\Functional;
+namespace src\ExistingSite;
 
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 use Drupal\Core\Url;
 use Drupal\helfi_platform_config\Entity\PublishableRedirect;
-use Drupal\Tests\BrowserTestBase;
-use Drupal\Tests\user\Traits\UserCreationTrait;
+use Drupal\Tests\helfi_api_base\Functional\ExistingSiteTestBase;
 
 /**
  * Tests `redirect.add` form.
+ *
+ * @group helfi_platform_config
  */
-class RedirectFormTest extends BrowserTestBase {
-
-  use UserCreationTrait;
-
-  /**
-   * {@inheritdoc}
-   */
-  protected $defaultTheme = 'stark';
+class RedirectFormTest extends ExistingSiteTestBase {
 
   /**
-   * {@inheritdoc}
-   */
-  protected static $modules = [
-    'redirect',
-    'helfi_platform_config',
-  ];
-
-  /**
-   * {@inheritDoc}
+   * Tests that saving redirect from entity form sets the custom field to TRUE.
    */
-  protected function setUp() : void {
-    parent::setUp();
-
+  public function testRedirectForm() {
     $user = $this->createUser([
       'administer redirects',
     ]);
     $this->drupalLogin($user);
-  }
 
-  /**
-   * Tests that saving redirect from entity form sets the custom field to TRUE.
-   */
-  public function testRedirectForm() {
     $edit = [
       'redirect_source[0][path]' => 'test',
       'redirect_redirect[0][uri]' => '<front>',
       'status_code' => 307,
     ];
 
-    $this->drupalGet(Url::fromRoute('redirect.add')->toString());
+    $this->drupalGet(Url::fromRoute('redirect.add'));
     $this->submitForm($edit, 'Save');
 
     $redirects = $this->container