diff --git a/product_warranty/models/product_supplierinfo.py b/product_warranty/models/product_supplierinfo.py
index 070b7606..3ce480f1 100644
--- a/product_warranty/models/product_supplierinfo.py
+++ b/product_warranty/models/product_supplierinfo.py
@@ -11,7 +11,7 @@ class ProductSupplierInfo(models.Model):
 
     @api.model
     def _get_default_instructions(self):
-        """ Get selected lines to add to exchange """
+        """Get selected lines to add to exchange"""
         return self.env["return.instruction"].search(
             [("is_default", "=", True)], limit=1
         )