diff --git a/src/Codeception/Module/Symfony.php b/src/Codeception/Module/Symfony.php
index 39756533..cffeec4a 100644
--- a/src/Codeception/Module/Symfony.php
+++ b/src/Codeception/Module/Symfony.php
@@ -571,7 +571,9 @@ public function grabService($service)
     {
         $container = $this->_getContainer();
         if (!$container->has($service)) {
-            $this->fail("Service $service is not available in container");
+            $this->fail("Service $service is not available in container.
+            If the service isn't injected anywhere in your app, you need to set it to `public` in your `config/services_test.php`/`.yaml`,
+            see https://symfony.com/doc/current/testing.html#accessing-the-container");
         }
         return $container->get($service);
     }