diff --git a/tests/serializer/Helper/XmlDeserializerHelperTest.php b/tests/serializer/Helper/XmlDeserializerHelperTest.php
index d734afae3..259b28244 100644
--- a/tests/serializer/Helper/XmlDeserializerHelperTest.php
+++ b/tests/serializer/Helper/XmlDeserializerHelperTest.php
@@ -98,7 +98,9 @@ public function testGetDomNodesByName(): void {
     public function testLog(): void {
 
         XmlDeserializerHelper::setLogger($this->logger);
-        $this->assertNull(XmlDeserializerHelper::log($this->document->documentElement));
+
+        XmlDeserializerHelper::log($this->document->documentElement);
+        $this->assertNull(null);
     }
 
     /**
@@ -109,6 +111,8 @@ public function testLog(): void {
     public function testLogWithoutLogger(): void {
 
         XmlDeserializerHelper::setLogger(null);
-        $this->assertNull(XmlDeserializerHelper::log($this->document->documentElement));
+
+        XmlDeserializerHelper::log($this->document->documentElement);
+        $this->assertNull(null);
     }
 }
diff --git a/tests/sorter/Helper/AlphabeticalTreeNodeHelperTest.php b/tests/sorter/Helper/AlphabeticalTreeNodeHelperTest.php
index 333567092..46b79c2d4 100644
--- a/tests/sorter/Helper/AlphabeticalTreeNodeHelperTest.php
+++ b/tests/sorter/Helper/AlphabeticalTreeNodeHelperTest.php
@@ -12,7 +12,6 @@
 namespace WBW\Library\Sorter\Tests\Helper;
 
 use WBW\Library\Sorter\Helper\AlphabeticalTreeNodeHelper;
-use WBW\Library\Sorter\Model\AlphabeticalTreeNodeInterface;
 use WBW\Library\Sorter\Tests\AbstractTestCase;
 use WBW\Library\Sorter\Tests\Fixtures\Model\TestNode;
 use WBW\Library\Sorter\Tests\Fixtures\TestFixtures;