core/lib/Drupal/Core/Access/AccessResult.php | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/core/lib/Drupal/Core/Access/AccessResult.php b/core/lib/Drupal/Core/Access/AccessResult.php
index 143361e..eaa2450 100644
--- a/core/lib/Drupal/Core/Access/AccessResult.php
+++ b/core/lib/Drupal/Core/Access/AccessResult.php
@@ -114,7 +114,7 @@ public static function allowedIfHasPermission(AccountInterface $account, $permis
     $access_result = static::allowedIf($account->hasPermission($permission))->addCacheContexts(['user.permissions']);
 
     if ($access_result instanceof AccessResultReasonInterface) {
-      $access_result->setReason("The {$permission} permission is required.");
+      $access_result->setReason("The '$permission' permission is required.");
     }
     return $access_result;
   }
@@ -157,7 +157,21 @@ public static function allowedIfHasPermissions(AccountInterface $account, array
       }
     }
 
-    return static::allowedIf($access)->addCacheContexts(empty($permissions) ? [] : ['user.permissions']);
+    $access_result = static::allowedIf($access)->addCacheContexts(empty($permissions) ? [] : ['user.permissions']);
+
+    if ($access_result instanceof AccessResultReasonInterface) {
+      if (count($permissions) === 1) {
+        $access_result->setReason("The '$permission' permission is required.");
+      }
+      else {
+        $quote = function ($s) {
+          return "'$s'";
+        };
+        $access_result->setReason(sprintf("The following permissions are required: %s.", implode(" $conjunction ", array_map($quote, $permissions))));
+      }
+    }
+
+    return $access_result;
   }
 
   /**