diff --git a/src/Cart.php b/src/Cart.php
index 746ef7d..7e7e6b3 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -501,13 +501,13 @@ class Cart
     /**
      * Set the global tax rate for the cart.
      * This will set the tax rate for all items.
-     * 
+     *
      * @param float $discount
      */
     public function setGlobalTax($taxRate)
     {
         $this->taxRate = $taxRate;
-        
+
         $content = $this->getContent();
         if ($content && $content->count()) {
             $content->each(function ($item, $key) {
@@ -597,7 +597,7 @@ class Cart
         if ($identifier instanceof InstanceIdentifier) {
             $identifier = $identifier->getInstanceIdentifier();
         }
-            
+
         if (!$this->storedCartWithIdentifierExists($identifier)) {
             return;
         }
@@ -685,6 +685,7 @@ class Cart
         if ($this->session->has($this->instance)) {
             return $this->session->get($this->instance);
         }
+
         return new Collection();
     }
 
@@ -728,6 +729,7 @@ class Cart
         if (!is_array($item)) {
             return false;
         }
+
         return is_array(head($item)) || head($item) instanceof Buyable;
     }
 
diff --git a/src/CartItem.php b/src/CartItem.php
index 75009bf..ffafaf9 100644
--- a/src/CartItem.php
+++ b/src/CartItem.php
@@ -94,7 +94,7 @@ class CartItem implements Arrayable, Jsonable
         if (empty($name)) {
             throw new \InvalidArgumentException('Please supply a valid name.');
         }
-        if (strlen($price) < 0 ||!is_numeric($price)) {
+        if (strlen($price) < 0 || !is_numeric($price)) {
             throw new \InvalidArgumentException('Please supply a valid price.');
         }
 
@@ -371,13 +371,14 @@ class CartItem implements Arrayable, Jsonable
                 return $this->discount * $this->qty;
             case 'weightTotal':
                 return $this->weight * $this->qty;
-            
+
             case 'model':
                 if (isset($this->associatedModel)) {
-                    return with(new $this->associatedModel)->find($this->id);
+                    return with(new $this->associatedModel())->find($this->id);
                 }
+
                 return;
-            
+
             default:
                 return;
         }
diff --git a/styleci.yml b/styleci.yml
index 0285f17..9d32921 100644
--- a/styleci.yml
+++ b/styleci.yml
@@ -1 +1,5 @@
 preset: laravel
+
+finder:
+  exclude:
+    - "tests"
\ No newline at end of file