diff --git a/Classes/Command/S3CommandController.php b/Classes/Command/S3CommandController.php
index 9573314..4039d73 100644
--- a/Classes/Command/S3CommandController.php
+++ b/Classes/Command/S3CommandController.php
@@ -111,7 +111,6 @@ public function listBucketsCommand(): void
         } catch (\Exception $e) {
             $this->outputLine($e->getMessage());
             $this->quit(1);
-            exit;
         }
 
         if (count($result['Buckets']) === 0) {
@@ -144,7 +143,6 @@ public function flushBucketCommand(string $bucket): void
         } catch (\Exception $e) {
             $this->outputLine($e->getMessage());
             $this->quit(1);
-            exit;
         }
         $promise->wait();
         $this->outputLine('Successfully flushed bucket %s.', [$bucket]);
diff --git a/Classes/S3Target.php b/Classes/S3Target.php
index 7b781c6..47831b2 100644
--- a/Classes/S3Target.php
+++ b/Classes/S3Target.php
@@ -229,7 +229,7 @@ public function getKeyPrefix(): string
      */
     public function getAcl()
     {
-        return isset($this->acl) ? $this->acl : $this->defaultAcl;
+        return $this->acl ?? $this->defaultAcl;
     }
 
     /**
@@ -514,7 +514,7 @@ protected function publishFile($sourceStream, string $relativeTargetPathAndFilen
         ];
 
         try {
-            $this->s3Client->upload($this->bucketName, $objectName, $sourceStream, $this->getAcl() ? $this->getAcl() : null, $options);
+            $this->s3Client->upload($this->bucketName, $objectName, $sourceStream, $this->getAcl() ?: null, $options);
             $this->systemLogger->debug(sprintf('Successfully published resource as object "%s" in bucket "%s" with SHA1 hash "%s"', $objectName, $this->bucketName, $metaData->getSha1() ?: 'unknown'));
         } catch (\Exception $e) {
             $this->systemLogger->debug(sprintf('Failed publishing resource as object "%s" in bucket "%s" with SHA1 hash "%s": %s', $objectName, $this->bucketName, $metaData->getSha1() ?: 'unknown', $e->getMessage()));