[TASK] Make FlashMessagesViewHelperTest notice free

Releases: master
Resolves: #84346
Change-Id: Ie42bb8d7263ec0ca44b38ca6fb8d39aba5dcd43a
Reviewed-on: https://review.typo3.org/56226
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/fluid/Tests/Unit/ViewHelpers/FlashMessagesViewHelperTest.php

@@ -24,11 +24,6 @@
  */
 class FlashMessagesViewHelperTest extends ViewHelperBaseTestcase
 {
-    /**
-     * Subject is not notice free, disable E_NOTICES
-     */
-    protected static $suppressNotices = true;
-
     /**
      * @var \TYPO3\CMS\Fluid\ViewHelpers\FlashMessagesViewHelper
      */
@@ -57,6 +52,12 @@ protected function setUp()
      */
     public function renderReturnsEmptyStringIfNoFlashMessagesAreInQueue()
     {
+        $this->setArgumentsUnderTest(
+            $this->viewHelper,
+            [
+                'as' => null
+            ]
+        );
         $this->flashMessageQueue->getAllMessagesAndFlush()->willReturn();
         $this->assertEmpty($this->viewHelper->initializeArgumentsAndRender());
     }