diff --git a/tests/Providers/Rng/TestRNGProvider.php b/tests/Providers/Rng/TestRNGProvider.php
index 78ceec1..c166c66 100644
--- a/tests/Providers/Rng/TestRNGProvider.php
+++ b/tests/Providers/Rng/TestRNGProvider.php
@@ -8,7 +8,7 @@ use RobThree\Auth\Providers\Rng\IRNGProvider;
 
 class TestRNGProvider implements IRNGProvider
 {
-    public function __construct(private bool $isSecure = false)
+    public function __construct(private readonly bool $isSecure = false)
     {
     }