diff --git a/Classes/Domain/Service/Provider/CustomerMail.php b/Classes/Domain/Service/Provider/CustomerMail.php
index 75bc140c..67437966 100644
--- a/Classes/Domain/Service/Provider/CustomerMail.php
+++ b/Classes/Domain/Service/Provider/CustomerMail.php
@@ -3,8 +3,6 @@
 declare(strict_types=1);
 namespace In2code\Lux\Domain\Service\Provider;
 
-use TYPO3\CMS\Extbase\Configuration\Exception\InvalidConfigurationTypeException;
-
 /**
  * Class CustomerMail
  * this class can decide if an email belongs to a b2c or b2b contact
diff --git a/Tests/Unit/Utility/EmailUtilityTest.php b/Tests/Unit/Utility/EmailUtilityTest.php
index d85283eb..07835929 100644
--- a/Tests/Unit/Utility/EmailUtilityTest.php
+++ b/Tests/Unit/Utility/EmailUtilityTest.php
@@ -55,7 +55,7 @@ public function testExtendEmailReceiverArray(array $emails, ?string $name, array
         } else {
             $result = EmailUtility::extendEmailReceiverArray($emails);
         }
-        $this->assertSame($expectedResult, $result);
+        self::assertSame($expectedResult, $result);
     }
 
     /**
@@ -64,9 +64,9 @@ public function testExtendEmailReceiverArray(array $emails, ?string $name, array
      */
     public function testGetDomainFromEmail(): void
     {
-        $this->assertSame('in2code.de', EmailUtility::getDomainFromEmail('test@in2code.de'));
-        $this->assertSame('fuz.bayern', EmailUtility::getDomainFromEmail('foo.bar@fuz.bayern'));
-        $this->assertSame('', EmailUtility::getDomainFromEmail(''));
-        $this->assertSame('', EmailUtility::getDomainFromEmail('foobar'));
+        self::assertSame('in2code.de', EmailUtility::getDomainFromEmail('test@in2code.de'));
+        self::assertSame('fuz.bayern', EmailUtility::getDomainFromEmail('foo.bar@fuz.bayern'));
+        self::assertSame('', EmailUtility::getDomainFromEmail(''));
+        self::assertSame('', EmailUtility::getDomainFromEmail('foobar'));
     }
 }