Empty files should work as well

.circleci/config.yml

@@ -66,10 +66,39 @@ jobs:
             composer update -n --prefer-dist
             php vendor/bin/phpunit --testsuite=no-optional-deps --exclude-group=without-filesystem-message
 
+  test-php81:
+    docker:
+      - image: cimg/php:8.1
+
+    working_directory: ~/project
+    steps:
+      - checkout
+      - run:
+          name: Run tests / Symfony 5^0
+          command: |
+            rm -Rf var/*
+            composer update -n --prefer-dist
+            php vendor/bin/phpunit --testsuite=no-optional-deps --exclude-group=without-filesystem-message
+
+  test-php82:
+    docker:
+      - image: cimg/php:8.2
+
+    working_directory: ~/project
+    steps:
+      - checkout
+      - run:
+          name: Run tests / Symfony 5^0
+          command: |
+            rm -Rf var/*
+            composer update -n --prefer-dist
+            php vendor/bin/phpunit --testsuite=no-optional-deps --exclude-group=without-filesystem-message
 workflows:
   version: 2
   test:
     jobs:
       - test-php74
       - test-php74-with-filesystem
       - test-php80
+      - test-php81
+      - test-php82

src/Adapter/SymfonyKernelBasedAdapter.php

@@ -125,7 +125,7 @@ public static function create(
      */
     protected function preload(): PromiseInterface
     {
-        return resolve();
+        return resolve(null);
     }
 
     /**
@@ -293,7 +293,7 @@ private function toSymfonyUploadedFile(PsrUploadedFile $file): PromiseInterface
                         ->file($tmpFilename)
                         ->putContents($content)
             )
-            : resolve();
+            : resolve(null);
 
         return $promise
             ->then(function () use ($file, $tmpFilename, $filename) {
@@ -316,6 +316,12 @@ private function cleanTemporaryUploadedFiles(Request $request): array
     {
         return array_map(function (SymfonyUploadedFile $file) {
             $filePath = $file->getPath().'/'.$file->getFilename();
+            if (
+                $file->getError() !== 0 ||
+                $filePath === '/'
+            ) {
+                return resolve(null);
+            }
 
             return (is_null($this->filesystem))
                 ? resolve(unlink($filePath))

tests/FakeLaminasKernel.php

@@ -83,7 +83,7 @@ public static function getStaticFolder(): ? string
      */
     public function shutDown(): PromiseInterface
     {
-        return resolve();
+        return resolve(null);
     }
 
     /**