diff --git a/tests/Models/NullEventAttributeTest.php b/tests/Models/NullEventAttributeTest.php
index 4d0c81b..6d7652e 100644
--- a/tests/Models/NullEventAttributeTest.php
+++ b/tests/Models/NullEventAttributeTest.php
@@ -37,7 +37,7 @@ final class NullEventAttributeTest extends \PHPUnit\Framework\TestCase
     public function testId() : void
     {
         $null = new NullEventAttribute(2);
-        self::assertEquals(2, $null->getId());
+        self::assertEquals(2, $null->id);
     }
 
     /**
diff --git a/tests/Models/NullEventAttributeTypeTest.php b/tests/Models/NullEventAttributeTypeTest.php
index dc4616b..979caff 100644
--- a/tests/Models/NullEventAttributeTypeTest.php
+++ b/tests/Models/NullEventAttributeTypeTest.php
@@ -37,7 +37,7 @@ final class NullEventAttributeTypeTest extends \PHPUnit\Framework\TestCase
     public function testId() : void
     {
         $null = new NullEventAttributeType(2);
-        self::assertEquals(2, $null->getId());
+        self::assertEquals(2, $null->id);
     }
 
     /**
diff --git a/tests/Models/NullEventAttributeValueTest.php b/tests/Models/NullEventAttributeValueTest.php
index 7728259..2a90266 100644
--- a/tests/Models/NullEventAttributeValueTest.php
+++ b/tests/Models/NullEventAttributeValueTest.php
@@ -37,7 +37,7 @@ final class NullEventAttributeValueTest extends \PHPUnit\Framework\TestCase
     public function testId() : void
     {
         $null = new NullEventAttributeValue(2);
-        self::assertEquals(2, $null->getId());
+        self::assertEquals(2, $null->id);
     }
 
     /**