diff --git a/typo3/sysext/extensionmanager/Classes/Utility/EmConfUtility.php b/typo3/sysext/extensionmanager/Classes/Utility/EmConfUtility.php
index 2d12496868c6..4b6295fcedd6 100644
--- a/typo3/sysext/extensionmanager/Classes/Utility/EmConfUtility.php
+++ b/typo3/sysext/extensionmanager/Classes/Utility/EmConfUtility.php
@@ -86,16 +86,16 @@ public function fixEmConf(array $emConf)
             || !isset($emConf['constraints']['conflicts']) || !isset($emConf['constraints']['suggests'])
         ) {
             if (!isset($emConf['constraints']) || !isset($emConf['constraints']['depends'])) {
-                $emConf['constraints']['depends'] = $this->stringToDependency($emConf['dependencies']);
-                if ((string)$emConf['PHP_version'] !== '') {
+                $emConf['constraints']['depends'] = $this->stringToDependency($emConf['dependencies'] ?? '');
+                if (isset($emConf['PHP_version']) && (string)$emConf['PHP_version'] !== '') {
                     $emConf['constraints']['depends']['php'] = $emConf['PHP_version'];
                 }
-                if ((string)$emConf['TYPO3_version'] !== '') {
+                if (isset($emConf['TYPO3_version']) && (string)$emConf['TYPO3_version'] !== '') {
                     $emConf['constraints']['depends']['typo3'] = $emConf['TYPO3_version'];
                 }
             }
             if (!isset($emConf['constraints']) || !isset($emConf['constraints']['conflicts'])) {
-                $emConf['constraints']['conflicts'] = $this->stringToDependency($emConf['conflicts']);
+                $emConf['constraints']['conflicts'] = $this->stringToDependency($emConf['conflicts'] ?? '');
             }
             if (!isset($emConf['constraints']) || !isset($emConf['constraints']['suggests'])) {
                 $emConf['constraints']['suggests'] = [];
diff --git a/typo3/sysext/extensionmanager/Tests/Unit/Utility/EmConfUtilityTest.php b/typo3/sysext/extensionmanager/Tests/Unit/Utility/EmConfUtilityTest.php
index 2d9ee242235d..5b98cca06f28 100644
--- a/typo3/sysext/extensionmanager/Tests/Unit/Utility/EmConfUtilityTest.php
+++ b/typo3/sysext/extensionmanager/Tests/Unit/Utility/EmConfUtilityTest.php
@@ -14,15 +14,14 @@
  * The TYPO3 project - inspiring people to share!
  */
 
+use TYPO3\CMS\Extensionmanager\Utility\EmConfUtility;
+use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
+
 /**
  * Test case
  */
-class EmConfUtilityTest extends \TYPO3\TestingFramework\Core\Unit\UnitTestCase
+class EmConfUtilityTest extends UnitTestCase
 {
-    /**
-     * Subject is not notice free, disable E_NOTICES
-     */
-    protected static $suppressNotices = true;
 
     /**
      * @test
@@ -33,7 +32,7 @@ public function constructEmConfAddsCommentBlock()
             'extKey' => 'key',
             'EM_CONF' => [],
         ];
-        $fixture = new \TYPO3\CMS\Extensionmanager\Utility\EmConfUtility();
+        $fixture = new EmConfUtility();
         $emConf = $fixture->constructEmConf($extensionData);
         $this->assertContains('Extension Manager/Repository config file for ext', $emConf);
     }
@@ -57,7 +56,7 @@ public function fixEmConfTransfersOldConflictSettingToNewFormatWithSingleConflic
                 'suggests' => [],
             ],
         ];
-        $fixture = new \TYPO3\CMS\Extensionmanager\Utility\EmConfUtility();
+        $fixture = new EmConfUtility();
         $this->assertEquals($expected, $fixture->fixEmConf($input));
     }
 
@@ -81,7 +80,7 @@ public function fixEmConfTransfersOldConflictSettingToNewFormatWithTwoConflictin
                 'suggests' => [],
             ],
         ];
-        $fixture = new \TYPO3\CMS\Extensionmanager\Utility\EmConfUtility();
+        $fixture = new EmConfUtility();
         $this->assertEquals($expected, $fixture->fixEmConf($input));
     }
 }