diff --git a/tests/Fixtures/BuyableProduct.php b/tests/Fixtures/BuyableProduct.php
index ae7cedc..147b421 100644
--- a/tests/Fixtures/BuyableProduct.php
+++ b/tests/Fixtures/BuyableProduct.php
@@ -28,7 +28,7 @@ class BuyableProduct extends Model implements Buyable
     protected $attributes = [
         'id'       => 1,
         'name'     => 'Item name',
-        'price'    => 10.00,
+        'price'    => '10.00',
         'currency' => 'USD',
         'weight'   => 0,
     ];