diff --git a/application/src/Entity/AbstractEntity.php b/application/src/Entity/AbstractEntity.php
index 7a5f7fd..9590092 100644
--- a/application/src/Entity/AbstractEntity.php
+++ b/application/src/Entity/AbstractEntity.php
@@ -31,6 +31,5 @@ abstract class AbstractEntity implements EntityInterface
 
     public function __construct()
     {
-        // $this->id = 0;
     }
 }
diff --git a/application/src/Entity/Meta/Relation.php b/application/src/Entity/Meta/Relation.php
index 6177050..1d4e626 100644
--- a/application/src/Entity/Meta/Relation.php
+++ b/application/src/Entity/Meta/Relation.php
@@ -81,6 +81,5 @@ final class Relation extends AbstractMeta implements RelationInterface
         $this->law = new Law();
         $this->parents = new ArrayCollection();
         $this->childs = new ArrayCollection();
-        //$this->law->setNode($this);
     }
 }
diff --git a/application/tests/unit/Entity/AbstractEntityTest.php b/application/tests/unit/Entity/AbstractEntityTest.php
new file mode 100644
index 0000000..41b0fe0
--- /dev/null
+++ b/application/tests/unit/Entity/AbstractEntityTest.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Entity;
+
+use PHPUnit\Framework\TestCase;
+
+class AbstractEntityTest extends TestCase
+{
+    /**
+     * @var EntityInterface
+     */
+    protected $entity;
+
+    public function setUp(): void
+    {
+        $this->entity = new class() extends AbstractEntity {
+        };
+    }
+
+    public function testConstructor(): void
+    {
+        $this->expectException(\TypeError::class);
+        $this->entity->getId();
+        $this->entity->getVersion();
+    }
+
+    public function testVersion(): void
+    {
+        $version = 123;
+        $this->assertNull($this->entity->setVersion($version));
+        $this->assertEquals($version, $this->entity->getVersion());
+    }
+
+    public function testId(): void
+    {
+        $id = 123;
+        $this->assertNull($this->entity->setId($id));
+        $this->assertEquals($id, $this->entity->getId());
+    }
+}