Issue #3361907 by tBKoT: Use Address 2.x

Closes #3361907

modules/checkout/tests/src/Functional/CheckoutOrderTest.php

@@ -110,7 +110,7 @@ class CheckoutOrderTest extends CommerceBrowserTestBase {
     $checkout_flow = $this->container->get('entity_type.manager')->getStorage('commerce_checkout_flow')->load('default');
 
     // We're on a form, so no Page Cache.
-    $this->assertSession()->responseHeaderEquals('X-Drupal-Cache', NULL);
+    $this->assertSession()->responseHeaderDoesNotExist('X-Drupal-Cache');
     // Dynamic page cache should be present, and a MISS.
     $this->assertSession()->responseHeaderEquals('X-Drupal-Dynamic-Cache', 'MISS');