diff --git a/core/modules/dblog/src/Tests/DbLogTest.php b/core/modules/dblog/src/Tests/DbLogTest.php
index 79cc038054..01dc30a6d7 100644
--- a/core/modules/dblog/src/Tests/DbLogTest.php
+++ b/core/modules/dblog/src/Tests/DbLogTest.php
@@ -220,7 +220,7 @@ private function generateLogEntries($count, $options = []) {
       'link'        => $link,
       'user'        => $this->adminUser,
       'uid'         => $this->adminUser->id(),
-      'request_uri' => $base_root . \Drupal::request()->getRequestUri(),
+      'request_uri' => $base_root . '/' . \Drupal::request()->getRequestUri(),
       'referer'     => \Drupal::request()->server->get('HTTP_REFERER'),
       'ip'          => '127.0.0.1',
       'timestamp'   => REQUEST_TIME,