diff --git a/tests/Models/NullInformBlacklistTest.php b/tests/Models/NullInformBlacklistTest.php
index 4a8589b..a7a5b6f 100644
--- a/tests/Models/NullInformBlacklistTest.php
+++ b/tests/Models/NullInformBlacklistTest.php
@@ -47,6 +47,6 @@ final class NullInformBlacklistTest extends \PHPUnit\Framework\TestCase
     public function testJsonSerialize() : void
     {
         $null = new NullInformBlacklist(2);
-        self::assertEquals(['id' => 2], $null);
+        self::assertEquals(['id' => 2], $null->jsonSerialize());
     }
 }
diff --git a/tests/Models/NullInformTest.php b/tests/Models/NullInformTest.php
index 5d8b069..2a5e7c5 100644
--- a/tests/Models/NullInformTest.php
+++ b/tests/Models/NullInformTest.php
@@ -47,6 +47,6 @@ final class NullInformTest extends \PHPUnit\Framework\TestCase
     public function testJsonSerialize() : void
     {
         $null = new NullInform(2);
-        self::assertEquals(['id' => 2], $null);
+        self::assertEquals(['id' => 2], $null->jsonSerialize());
     }
 }
diff --git a/tests/Models/NullReportTest.php b/tests/Models/NullReportTest.php
index d45247e..d5c5e81 100644
--- 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/NullResourceTest.php b/tests/Models/NullResourceTest.php
index e3b467f..6fb16e8 100644
--- a/tests/Models/NullResourceTest.php
+++ b/tests/Models/NullResourceTest.php
@@ -47,6 +47,6 @@ final class NullResourceTest extends \PHPUnit\Framework\TestCase
     public function testJsonSerialize() : void
     {
         $null = new NullResource(2);
-        self::assertEquals(['id' => 2], $null);
+        self::assertEquals(['id' => 2], $null->jsonSerialize());
     }
 }