diff --git a/typo3/sysext/extbase/Classes/Scheduler/Task.php b/typo3/sysext/extbase/Classes/Scheduler/Task.php
index 614dfdc3a69e15931f33ecd93117dbd5b1eb9b27..384a289c9e4376f39c4474bfefeb7b53fdcf5224 100644
--- a/typo3/sysext/extbase/Classes/Scheduler/Task.php
+++ b/typo3/sysext/extbase/Classes/Scheduler/Task.php
@@ -178,7 +178,7 @@ class Task extends AbstractTask
         if (!empty($this->arguments)) {
             $arguments = [];
             foreach ($this->arguments as $argumentName => $argumentValue) {
-                if ($argumentValue != $this->defaults[$argumentName]) {
+                if (!isset($this->defaults[$argumentName]) || $argumentValue != $this->defaults[$argumentName]) {
                     $arguments[] = $argumentName . '=' . $argumentValue;
                 }
             }
diff --git a/typo3/sysext/extbase/Tests/Unit/Scheduler/TaskTest.php b/typo3/sysext/extbase/Tests/Unit/Scheduler/TaskTest.php
index 34bb8e5a763117fc38eddfc19b204fd3ade27e7b..baec05cfad415e92848696858ee3fb50e72f6ee6 100644
--- a/typo3/sysext/extbase/Tests/Unit/Scheduler/TaskTest.php
+++ b/typo3/sysext/extbase/Tests/Unit/Scheduler/TaskTest.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 namespace TYPO3\CMS\Extbase\Tests\Unit\Scheduler;
 
 /*
@@ -14,16 +15,15 @@ namespace TYPO3\CMS\Extbase\Tests\Unit\Scheduler;
  * The TYPO3 project - inspiring people to share!
  */
 
+use TYPO3\CMS\Extbase\Scheduler\Task;
+use TYPO3\CMS\Extbase\Scheduler\TaskExecutor;
+use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
+
 /**
  * Test case
  */
-class TaskTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
+class TaskTest extends UnitTestCase
 {
-    /**
-     * Subject is not notice free, disable E_NOTICES
-     */
-    protected static $suppressNotices = true;
-
     /**
      * @var \TYPO3\CMS\Extbase\Scheduler\Task|\PHPUnit_Framework_MockObject_MockObject|\TYPO3\TestingFramework\Core\AccessibleObjectInterface
      */
@@ -36,11 +36,11 @@ class TaskTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
 
     protected function setUp()
     {
-        $this->taskExecutor = $this->getMockBuilder(\TYPO3\CMS\Extbase\Scheduler\TaskExecutor::class)
+        $this->taskExecutor = $this->getMockBuilder(TaskExecutor::class)
             ->setMethods(['execute'])
             ->disableOriginalConstructor()
             ->getMock();
-        $this->task = $this->getAccessibleMock(\TYPO3\CMS\Extbase\Scheduler\Task::class, ['logException', '__wakeup'], [], '', false);
+        $this->task = $this->getAccessibleMock(Task::class, ['logException', '__wakeup'], [], '', false);
     }
 
     /**