diff --git a/build/phprectorconfig.php b/build/phprectorconfig.php
index 94b5b1d..801790d 100644
--- a/build/phprectorconfig.php
+++ b/build/phprectorconfig.php
@@ -34,12 +34,12 @@
         instanceOf: true,
         earlyReturn: true,
         phpunitCodeQuality: true,
+        privatization: true,
         //
         carbon: false,
         deadCode: false,
         doctrineCodeQuality: false,
         naming: false,
-        privatization: false,
         rectorPreset: false,
         symfonyCodeQuality: false,
         symfonyConfigs: false,
diff --git a/src/ZugferdPdfValidator.php b/src/ZugferdPdfValidator.php
index 0b6e8a9..32869ee 100644
--- a/src/ZugferdPdfValidator.php
+++ b/src/ZugferdPdfValidator.php
@@ -850,7 +850,7 @@ private function performValidation(): bool
 
         $this->resetFileToValidateFilename();
 
-        if (file_put_contents($this->resolveFileToValidateFilename(), $this->getPdfContent()) === false) {
+        if (file_put_contents($this->resolveFileToValidateFilename(), $this->pdfContent) === false) {
             $this->addToMessageBag("Cannot create temporary file which contains the PDF to validate");
             return false;
         }