Add new file

Closes #3417106

tests/src/Kernel/Routing/ResourceEnhancerTest.php

@@ -17,6 +17,7 @@ final class ResourceEnhancerTest extends KernelTestBase {
    * {@inheritdoc}
    */
   protected static $modules = [
+    'file',
     'serialization',
     'jsonapi',
     'jsonapi_resources',