diff --git a/tests/Assets/AssetContainerTest.php b/tests/Assets/AssetContainerTest.php
index 5e76b1794d..2902e2e57b 100644
--- a/tests/Assets/AssetContainerTest.php
+++ b/tests/Assets/AssetContainerTest.php
@@ -234,7 +234,7 @@ public function it_gets_and_sets_whether_downloading_is_allowed()
     public function it_gets_and_sets_the_validation_rules()
     {
         $container = new AssetContainer;
-        $this->assertNull($container->validation());
+        $this->assertEmpty($container->validation());
 
         $return = $container->validation(['max:5120']);