diff --git a/src/Tests/LinkTypeFieldEntryTest.php b/src/Tests/LinkTypeFieldEntryTest.php
index efbc58d..eabea1f 100644
--- a/src/Tests/LinkTypeFieldEntryTest.php
+++ b/src/Tests/LinkTypeFieldEntryTest.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\flag\Tests;
 
+use Drupal\Core\Url;
 use Drupal\field_ui\Tests\FieldUiTestTrait;
 
 /**
@@ -151,9 +152,11 @@ class LinkTypeFieldEntryTest extends FlagTestBase {
 
     // Get the details form.
     $this->clickLink($this->flag->getShortText('unflag'));
+
+    $node_url = Url::fromRoute('entity.node.canonical', ['node' => $this->nodeId]);
     $this->assertUrl('flag/details/edit/' . $flag_id . '/' . $this->nodeId, [
       'query' => [
-        'destination' => '/node/' . $this->nodeId,
+        'destination' => $node_url->toString(),
       ],
     ]);