diff --git a/phpstan.neon b/phpstan.neon
index 1b30a45210d0b5ba31596e7f500548a365248102..601521d201526eddb3cbb6d1dafbdba5e8497fca 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -246,10 +246,6 @@ parameters:
       message: "#^Parameter \\#1 \\$manifest of method TYPO3\\\\CMS\\\\Core\\\\Core\\\\ClassLoadingInformationGenerator\\:\\:getAutoloadSectionFromManifest\\(\\) expects stdClass, object given\\.$#"
       count: 2
       path: typo3/sysext/core/Classes/Core/ClassLoadingInformationGenerator.php
-    -
-      message: "#^Parameter \\#1 \\$file of method TYPO3\\\\CMS\\\\Core\\\\Controller\\\\FileDumpController\\:\\:isFileValid\\(\\) expects TYPO3\\\\CMS\\\\Core\\\\Resource\\\\FileInterface, TYPO3\\\\CMS\\\\Core\\\\Resource\\\\File\\|null given\\.$#"
-      count: 1
-      path: typo3/sysext/core/Classes/Controller/FileDumpController.php
     -
       message: "#^Parameter \\#2 \\$callback of function array_walk expects callable\\(\\)\\: mixed, array\\(\\$this\\(TYPO3\\\\CMS\\\\Core\\\\Cache\\\\Backend\\\\AbstractBackend\\), 'flushByTag'\\) given\\.$#"
       count: 1
diff --git a/typo3/sysext/core/Classes/Controller/FileDumpController.php b/typo3/sysext/core/Classes/Controller/FileDumpController.php
index 4b5026ad4b6ac00a832a68c6dc5855464af0d199..fedfd0091aecbf4b7a71b22a0a2f0c37c273b59c 100644
--- a/typo3/sysext/core/Classes/Controller/FileDumpController.php
+++ b/typo3/sysext/core/Classes/Controller/FileDumpController.php
@@ -182,8 +182,7 @@ class FileDumpController
                 $file = $this->resourceFactory->getFileObject($parameters['f']);
                 if ($file->isDeleted() || $file->isMissing()) {
                     $file = null;
-                }
-                if (!$this->isFileValid($file)) {
+                } elseif (!$this->isFileValid($file)) {
                     $file = null;
                 }
             } catch (\Exception $e) {