Merge pull request magento#9 from magento-tsg/MC-38546

[Arrows] MC-38546: Warnings in Unit tests build log

Author: sivaschenko

AdobeStockImageAdminUi/Test/Unit/Controller/Adminhtml/Preview/DownloadTest.php

@@ -102,7 +102,7 @@ protected function setUp(): void
                     'isAjax' => 'true',
                     'media_id' => 283415387,
                     'destination_path' => '',
-                    'form_key' => 'PyXOATf2fL9Y8iZf'
+                    'form_key' => 'PyXOATf2fL9Y8iZf',
                 ]
             );
         $this->getAssetById->expects($this->once())
@@ -115,7 +115,7 @@ protected function setUp(): void
         $this->context->expects($this->once())
             ->method('getResultFactory')
             ->willReturn($this->resultFactory);
-        $this->saveImage->expects($this->once())->method('execute')->willReturn(null);
+        $this->saveImage->expects($this->once())->method('execute');
         $this->jsonObject = $this->createMock(Json::class);
         $this->resultFactory->expects($this->once())->method('create')->with('json')->willReturn($this->jsonObject);