diff --git a/tests/Models/NullReportTest.php b/tests/Models/NullReportTest.php
index fdf7b75..b2b7878 100755
--- a/tests/Models/NullReportTest.php
+++ b/tests/Models/NullReportTest.php
@@ -47,6 +47,6 @@ final class NullReportTest extends \PHPUnit\Framework\TestCase
     public function testJsonSerialize() : void
     {
         $null = new NullReport(2);
-        self::assertEquals(['id' => 2], $null);
+        self::assertEquals(['id' => 2], $null->jsonSerialize());
     }
 }
diff --git a/tests/Models/NullTemplateTest.php b/tests/Models/NullTemplateTest.php
index cdfb587..7bf8558 100755
--- a/tests/Models/NullTemplateTest.php
+++ b/tests/Models/NullTemplateTest.php
@@ -47,6 +47,6 @@ final class NullTemplateTest extends \PHPUnit\Framework\TestCase
     public function testJsonSerialize() : void
     {
         $null = new NullTemplate(2);
-        self::assertEquals(['id' => 2], $null);
+        self::assertEquals(['id' => 2], $null->jsonSerialize());
     }
 }