diff --git a/src/Services/ItemSearch/Factories/Faker/Traits/HandleNestedArray.php b/src/Services/ItemSearch/Factories/Faker/Traits/HandleNestedArray.php
index 70ed2dbe1..f266a3926 100644
--- a/src/Services/ItemSearch/Factories/Faker/Traits/HandleNestedArray.php
+++ b/src/Services/ItemSearch/Factories/Faker/Traits/HandleNestedArray.php
@@ -20,7 +20,7 @@ protected function merge(&$object, $defaults)
                 {
                     $this->merge($object[$key], (array)$defaultValue);
                 }
-                else if (is_null($object[$key]))
+                else if (is_null($object[$key]) || $object[$key] === 0)
                 {
                     $object[$key] = $defaultValue;
                 }
diff --git a/src/Services/ItemSearch/Factories/Faker/VariationFaker.php b/src/Services/ItemSearch/Factories/Faker/VariationFaker.php
index 29c8b5d86..c9e17d1d7 100644
--- a/src/Services/ItemSearch/Factories/Faker/VariationFaker.php
+++ b/src/Services/ItemSearch/Factories/Faker/VariationFaker.php
@@ -66,7 +66,8 @@ public function fill($data)
             "automaticClientVisibility"             => $this->number(0, 3),
             "automaticListVisibility"               => $this->number(0, 3),
             "isHiddenInCategoryList"                => $this->boolean(),
-            "availability"                          => $this->makeAvailability()
+            "availability"                          => $this->makeAvailability(),
+            "customsTariffNumber"                   => $this->serial()
         ];
 
         $this->merge($data, $default);