diff --git a/core/modules/statistics/src/Tests/StatisticsReportsTest.php b/core/modules/statistics/src/Tests/StatisticsReportsTest.php
index 2dbfa8d..f2a79ff 100644
--- a/core/modules/statistics/src/Tests/StatisticsReportsTest.php
+++ b/core/modules/statistics/src/Tests/StatisticsReportsTest.php
@@ -6,7 +6,6 @@
  */
 
 namespace Drupal\statistics\Tests;
-use Drupal\Component\Utility\UrlHelper;
 
 /**
  * Tests display of statistics report blocks.
@@ -27,7 +26,7 @@ function testPopularContentBlock() {
     $this->drupalGet('node/' . $node->id());
     // Manually calling statistics.php, simulating ajax behavior.
     $nid = $node->id();
-    $post = UrlHelper::buildQuery(array('nid' => $nid));
+    $post = http_build_query(array('nid' => $nid));
     $headers = array('Content-Type' => 'application/x-www-form-urlencoded');
     global $base_url;
     $stats_path = $base_url . '/' . drupal_get_path('module', 'statistics'). '/statistics.php';