diff --git a/tests/Models/NullDashboardBoardTest.php b/tests/Models/NullDashboardBoardTest.php
index 78e05d7..a8ebe08 100755
--- a/tests/Models/NullDashboardBoardTest.php
+++ b/tests/Models/NullDashboardBoardTest.php
@@ -47,6 +47,6 @@ final class NullDashboardBoardTest extends \PHPUnit\Framework\TestCase
     public function testJsonSerialize() : void
     {
         $null = new NullDashboardBoard(2);
-        self::assertEquals(['id' => 2], $null);
+        self::assertEquals(['id' => 2], $null->jsonSerialize());
     }
 }
diff --git a/tests/Models/NullDashboardComponentTest.php b/tests/Models/NullDashboardComponentTest.php
index e84db0e..f640e61 100755
--- a/tests/Models/NullDashboardComponentTest.php
+++ b/tests/Models/NullDashboardComponentTest.php
@@ -47,6 +47,6 @@ final class NullDashboardComponentTest extends \PHPUnit\Framework\TestCase
     public function testJsonSerialize() : void
     {
         $null = new NullDashboardComponent(2);
-        self::assertEquals(['id' => 2], $null);
+        self::assertEquals(['id' => 2], $null->jsonSerialize());
     }
 }