src/Access/CustomParameterNamesAccessCheck.php                | 7 +------
 src/JsonApiSpec.php                                           | 2 +-
 tests/src/Unit/Access/CustomParameterNamesAccessCheckTest.php | 3 +--
 3 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/src/Access/CustomParameterNamesAccessCheck.php b/src/Access/CustomParameterNamesAccessCheck.php
index 5f0d082..98dc812 100644
--- a/src/Access/CustomParameterNamesAccessCheck.php
+++ b/src/Access/CustomParameterNamesAccessCheck.php
@@ -6,7 +6,6 @@ use Drupal\Core\Access\AccessResult;
 use Drupal\Core\Routing\Access\AccessInterface;
 use Drupal\jsonapi\JsonApiSpec;
 use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\Routing\Route;
 
 /**
  * Validates custom (implementation-specific) query parameter names.
@@ -20,17 +19,13 @@ class CustomParameterNamesAccessCheck implements AccessInterface {
   /**
    * Validates the JSONAPI parameter names.
    *
-   * * @param \Symfony\Component\Routing\Route $route
-   *   The route to check against.
    * @param \Symfony\Component\HttpFoundation\Request $request
    *   The request.
    *
    * @return \Drupal\Core\Access\AccessResult
    *   The access result.
    */
-  public function access(Route $route, Request $request) {
-    assert('$route->getRequirement("_json_api_custom_parameter_names") === "TRUE"');
-
+  public function access(Request $request) {
     $json_api_params = $request->attributes->get('_json_api_params', []);
     if (!$this->validate($json_api_params)) {
       return AccessResult::forbidden();
diff --git a/src/JsonApiSpec.php b/src/JsonApiSpec.php
index ec9cc0d..6e04310 100644
--- a/src/JsonApiSpec.php
+++ b/src/JsonApiSpec.php
@@ -7,7 +7,7 @@ namespace Drupal\jsonapi;
  *
  * @see http://jsonapi.org/format
  */
-final class JsonApiSpec {
+class JsonApiSpec {
 
   /**
    * Member name: globally allowed characters.
diff --git a/tests/src/Unit/Access/CustomParameterNamesAccessCheckTest.php b/tests/src/Unit/Access/CustomParameterNamesAccessCheckTest.php
index 547c98f..c53fee1 100644
--- a/tests/src/Unit/Access/CustomParameterNamesAccessCheckTest.php
+++ b/tests/src/Unit/Access/CustomParameterNamesAccessCheckTest.php
@@ -20,10 +20,9 @@ class CustomParameterNamesAccessCheckTest extends \PHPUnit_Framework_TestCase {
   public function testJsonApiParamsValidation($name, $valid) {
     $access_checker = new CustomParameterNamesAccessCheck();
 
-    $route = new Route('/foo', [], ['_json_api_custom_parameter_names' => 'TRUE']);
     $request = new Request();
     $request->attributes->set('_json_api_params', [$name => '123']);
-    $result = $access_checker->access($route, $request);
+    $result = $access_checker->access($request);
 
     if ($valid) {
       $this->assertTrue($result->isAllowed());