diff --git a/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php b/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
index f171580..b13c515 100644
--- a/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
+++ b/core/tests/Drupal/Tests/Core/Route/RoleAccessCheckTest.php
@@ -113,14 +113,14 @@ public function roleAccessProvider() {
     // Setup one user with the first role, one with the second, one with both
     // and one final without any of these two roles.
     $account_1 = new User(array('uid' => 1), 'user');
-    $account_1->roles[$rid_1] = $rid_1;
+    $account_1->roles[] = $rid_1;
 
     $account_2 = new User(array('uid' => 2), 'user');
-    $account_2->roles[$rid_2] = $rid_2;
+    $account_2->roles[] = $rid_2;
 
     $account_12 = new User(array('uid' => 3), 'user');
-    $account_12->roles[$rid_1] = $rid_1;
-    $account_12->roles[$rid_2] = $rid_2;
+    $account_12->roles[] = $rid_1;
+    $account_12->roles[] = $rid_2;
 
     $account_none = new User(array('uid' => 4), 'user');