diff --git a/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathProcessor.php b/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathProcessor.php
new file mode 100644
index 0000000000000000000000000000000000000000..b3611be40eb1f8013069f141b3a9da6b89e6dd3f
--- /dev/null
+++ b/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathProcessor.php
@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * @file
+ * Contains Drupal\url_alter_test\PathProcessor.
+ */
+
+namespace Drupal\url_alter_test;
+
+use Drupal\Core\PathProcessor\InboundPathProcessorInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Path processor for url_alter_test.
+ */
+class PathProcessor implements InboundPathProcessorInterface {
+
+  /**
+   * Implements Drupal\Core\PathProcessor\InboundPathProcessorInterface::processInbound().
+   */
+  public function processInbound($path, Request $request) {
+    if (preg_match('!^user/([^/]+)(/.*)?!', $path, $matches)) {
+      if ($account = user_load_by_name($matches[1])) {
+        $matches += array(2 => '');
+        $path = 'user/' . $account->uid . $matches[2];
+      }
+    }
+
+    // Rewrite community/ to forum/.
+    if ($path == 'community' || strpos($path, 'community/') === 0) {
+      $path = 'forum' . substr($path, 9);
+    }
+
+    if ($path == 'url-alter-test/bar') {
+      $path = 'url-alter-test/foo';
+    }
+    return $path;
+  }
+}
diff --git a/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathSubscriber.php b/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathSubscriber.php
deleted file mode 100644
index 3f4f728a91aeabfe81136fa674b41858e2ecaaaa..0000000000000000000000000000000000000000
--- a/core/modules/system/tests/modules/url_alter_test/lib/Drupal/url_alter_test/PathSubscriber.php
+++ /dev/null
@@ -1,59 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains Drupal\url_alter_test\PathSubscriber.
- */
-
-namespace Drupal\url_alter_test;
-
-use Drupal\Core\EventSubscriber\PathListenerBase;
-use Symfony\Component\HttpKernel\KernelEvents;
-use Symfony\Component\HttpKernel\Event\GetResponseEvent;
-use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-
-/**
- * Path subscriber for url_alter_test.
- */
-class PathSubscriber extends PathListenerBase implements EventSubscriberInterface {
-
-  /**
-   * Resolve the system path based on some arbitrary rules.
-   *
-   * @param Symfony\Component\HttpKernel\Event\GetResponseEvent $event
-   *   The Event to process.
-   */
-  public function onKernelRequestPathResolve(GetResponseEvent $event) {
-    $request = $event->getRequest();
-    $path = $this->extractPath($request);
-    // Rewrite user/username to user/uid.
-    if (preg_match('!^user/([^/]+)(/.*)?!', $path, $matches)) {
-      if ($account = user_load_by_name($matches[1])) {
-        $matches += array(2 => '');
-        $path = 'user/' . $account->uid . $matches[2];
-      }
-    }
-
-    // Rewrite community/ to forum/.
-    if ($path == 'community' || strpos($path, 'community/') === 0) {
-      $path = 'forum' . substr($path, 9);
-    }
-
-    if ($path == 'url-alter-test/bar') {
-      $path = 'url-alter-test/foo';
-    }
-
-    $this->setPath($request, $path);
-  }
-
-  /**
-   * Registers the methods in this class that should be listeners.
-   *
-   * @return array
-   *   An array of event listener definitions.
-   */
-  static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('onKernelRequestPathResolve', 100);
-    return $events;
-  }
-}
diff --git a/core/modules/system/tests/modules/url_alter_test/url_alter_test.services.yml b/core/modules/system/tests/modules/url_alter_test/url_alter_test.services.yml
index e65768238746592f29654fc0b332cee0029c6128..a05b3636c1fa52ced18854bcd06212b1a089c51d 100644
--- a/core/modules/system/tests/modules/url_alter_test/url_alter_test.services.yml
+++ b/core/modules/system/tests/modules/url_alter_test/url_alter_test.services.yml
@@ -1,5 +1,5 @@
 services:
   url_alter_test.path_subscriber:
-    class: Drupal\url_alter_test\PathSubscriber
+    class: Drupal\url_alter_test\PathProcessor
     tags:
-      - { name: event_subscriber }
+      - { name: path_processor_inbound, priority: 800 }