diff --git a/src/Plugin/PdfBackend/LocalServerPdfBackend.php b/src/Plugin/PdfBackend/LocalServerPdfBackend.php
index 67556ff5dc0a1e8f85f5207d5a225304fcc666e5..380455df6927acf9735a3d432716c2a0f3f6776c 100644
--- a/src/Plugin/PdfBackend/LocalServerPdfBackend.php
+++ b/src/Plugin/PdfBackend/LocalServerPdfBackend.php
@@ -26,13 +26,6 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  */
 class LocalServerPdfBackend extends PdfBackendBase implements ContainerFactoryPluginInterface {
 
-  /**
-   * The file system.
-   *
-   * @var \Drupal\Core\File\FileSystemInterface
-   */
-  protected $fileSystem;
-
   /**
    * Constructs a LocalServerPdfBackend plugin object.
    *
diff --git a/tests/modules/fillpdf_test/src/Plugin/PdfBackend/TestPdfBackend.php b/tests/modules/fillpdf_test/src/Plugin/PdfBackend/TestPdfBackend.php
index e098fcd7ec5e83ddb654e801a90688893e7ec95d..59853d14d7d91115b76c4f11df5531dbb6b6f148 100644
--- a/tests/modules/fillpdf_test/src/Plugin/PdfBackend/TestPdfBackend.php
+++ b/tests/modules/fillpdf_test/src/Plugin/PdfBackend/TestPdfBackend.php
@@ -19,13 +19,6 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  */
 class TestPdfBackend extends PdfBackendBase implements ContainerFactoryPluginInterface {
 
-  /**
-   * The plugin's configuration.
-   *
-   * @var array
-   */
-  protected $configuration;
-
   /**
    * Constructs a LocalFillPdfBackend plugin object.
    *