diff --git a/core/lib/Thelia/Core/Event/Cart/CartEvent.php b/core/lib/Thelia/Core/Event/Cart/CartEvent.php
index 4e1ed304d..b62f18f86 100644
--- a/core/lib/Thelia/Core/Event/Cart/CartEvent.php
+++ b/core/lib/Thelia/Core/Event/Cart/CartEvent.php
@@ -48,6 +48,7 @@ class CartEvent extends ActionEvent
     public function setAppend($append)
     {
         $this->append = $append;
+        return $this;
     }
 
     /**
@@ -64,6 +65,7 @@ class CartEvent extends ActionEvent
     public function setCartItem($cartItem)
     {
         $this->cartItem = $cartItem;
+        return $this;
     }
 
     /**
@@ -80,6 +82,7 @@ class CartEvent extends ActionEvent
     public function setNewness($newness)
     {
         $this->newness = $newness;
+        return $this;
     }
 
     /**
@@ -96,6 +99,7 @@ class CartEvent extends ActionEvent
     public function setProduct($product)
     {
         $this->product = $product;
+        return $this;
     }
 
     /**
@@ -112,6 +116,7 @@ class CartEvent extends ActionEvent
     public function setProductSaleElementsId($productSaleElementsId)
     {
         $this->productSaleElementsId = $productSaleElementsId;
+        return $this;
     }
 
     /**
@@ -128,6 +133,7 @@ class CartEvent extends ActionEvent
     public function setQuantity($quantity)
     {
         $this->quantity = $quantity;
+        return $this;
     }
 
     /**
@@ -145,5 +151,4 @@ class CartEvent extends ActionEvent
     {
         return $this->cart;
     }
-
-}
+}
\ No newline at end of file
diff --git a/core/lib/Thelia/Form/TaxCreationForm.php b/core/lib/Thelia/Form/TaxCreationForm.php
index 6ff0cc81e..d3483aa4e 100644
--- a/core/lib/Thelia/Form/TaxCreationForm.php
+++ b/core/lib/Thelia/Form/TaxCreationForm.php
@@ -28,6 +28,7 @@ use Thelia\Core\Form\Type\TheliaType;
 use Thelia\Core\Translation\Translator;
 use Thelia\TaxEngine\TaxEngine;
 use Thelia\Model\Tax;
+use Thelia\Core\HttpFoundation\Request;
 
 /**
  * Class TaxCreationForm
diff --git a/core/lib/Thelia/Model/Product.php b/core/lib/Thelia/Model/Product.php
index 12b98c890..5bcc56b46 100644
--- a/core/lib/Thelia/Model/Product.php
+++ b/core/lib/Thelia/Model/Product.php
@@ -55,6 +55,8 @@ class Product extends BaseProduct
 
     /**
      * Return the default PSE for this product.
+     *
+     * @return ProductSaleElements
      */
     public function getDefaultSaleElements() {
         return ProductSaleElementsQuery::create()->filterByProductId($this->id)->filterByIsDefault(true)->find();