diff --git a/core/tests/Drupal/FunctionalTests/Asset/AssetOptimizationTest.php b/core/tests/Drupal/FunctionalTests/Asset/AssetOptimizationTest.php
index dbc0a5d..20afd0b 100644
--- a/core/tests/Drupal/FunctionalTests/Asset/AssetOptimizationTest.php
+++ b/core/tests/Drupal/FunctionalTests/Asset/AssetOptimizationTest.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\FunctionalTests\Asset;
 
+use Drupal\Component\Utility\UrlHelper;
 use Drupal\Tests\BrowserTestBase;
 
 /**
@@ -58,11 +59,9 @@ public function testAssetAggregation() {
   }
 
   protected function assertAggregate($url, $from_php = TRUE) {
+    $url = $this->getAbsoluteUrl($url);
     $session = $this->getSession();
-    $query = [];
-    $parts = parse_url($url);
-    parse_str($parts['query'], $query);
-    $this->drupalGet($parts['path'], ['query' => $query]);
+    $session->visit($url);
     $page = $session->getPage();
     $this->assertResponse(200);
     $headers = $session->getResponseHeaders();