diff --git a/Admin/Installer.php b/Admin/Installer.php
index 3afe185..517062d 100755
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -18,7 +18,6 @@ use Model\Setting;
 use Model\SettingMapper;
 use phpOMS\Application\ApplicationAbstract;
 use phpOMS\Config\SettingsInterface;
-use phpOMS\DataStorage\Database\DatabasePool;
 use phpOMS\Module\InstallerAbstract;
 use phpOMS\Module\ModuleInfo;
 
diff --git a/tests/Models/TagTest.php b/tests/Models/TagTest.php
index b5b7c7a..9b2e329 100755
--- a/tests/Models/TagTest.php
+++ b/tests/Models/TagTest.php
@@ -41,7 +41,7 @@ final class TagTest extends \PHPUnit\Framework\TestCase
     public function testDefault() : void
     {
         self::assertEquals(0, $this->tag->getId());
-        self::assertEquals(null, $this->tag->owner);
+        self::assertNull($this->tag->owner);
         self::assertEquals(TagType::SINGLE, $this->tag->getType());
         self::assertEquals('00000000', $this->tag->color);
         self::assertEquals('', $this->tag->getL11n());
@@ -100,8 +100,8 @@ final class TagTest extends \PHPUnit\Framework\TestCase
     public function testSerialize() : void
     {
         $this->tag->setL11n($t = new TagL11n('Test'));
-        $this->tag->owner = new NullAccount(2);
-        $this->tag->color = 'ffffffff';
+        $this->tag->owner      = new NullAccount(2);
+        $this->tag->color      = 'ffffffff';
         $this->tag->setType(TagType::SHARED);
 
         self::assertEquals(