diff --git a/tests/_support/Models/ValidErrorsModel.php b/tests/_support/Models/ValidErrorsModel.php
index e05f801a6983..59a03c5c5125 100644
--- a/tests/_support/Models/ValidErrorsModel.php
+++ b/tests/_support/Models/ValidErrorsModel.php
@@ -24,6 +24,7 @@ class ValidErrorsModel extends Model
         'description',
     ];
     protected $validationRules = [
+        'id'   => 'permit_empty|is_natural_no_zero',
         'name' => [
             'required',
             'min_length[10]',
diff --git a/tests/_support/Models/ValidModel.php b/tests/_support/Models/ValidModel.php
index 216f80cc3f87..6baefbe98742 100644
--- a/tests/_support/Models/ValidModel.php
+++ b/tests/_support/Models/ValidModel.php
@@ -24,6 +24,7 @@ class ValidModel extends Model
         'description',
     ];
     protected $validationRules = [
+        'id'   => 'permit_empty|is_natural_no_zero',
         'name' => [
             'required',
             'min_length[3]',
diff --git a/tests/system/Models/ValidationModelTest.php b/tests/system/Models/ValidationModelTest.php
index 9e1172f54517..50c42b350fd4 100644
--- a/tests/system/Models/ValidationModelTest.php
+++ b/tests/system/Models/ValidationModelTest.php
@@ -242,6 +242,7 @@ public function testValidationWithGroupName(): void
     {
         $config = new class () extends Validation {
             public $grouptest = [
+                'id'   => 'is_natural_no_zero',
                 'name' => [
                     'required',
                     'min_length[3]',