diff --git a/models/sale_order_line.py b/models/sale_order_line.py
index a611b87ca2ad8c8cbe1b22cf14b569974d5e3db1..8c61fefb489755fd2581059015e8e11539b0f51e 100644
--- a/models/sale_order_line.py
+++ b/models/sale_order_line.py
@@ -29,7 +29,6 @@ class SaleOrderLine(models.Model):
     # ------------------------------------------------------
     def _timesheet_create_task_prepare_values(self, project):
         values = super()._timesheet_create_task_prepare_values()
-        values['date_end'] = self.estimated_date_invoice
-        values['date_deadline'] = self.estimated_date_invoice
+        values["date_end"] = self.estimated_date_invoice
+        values["date_deadline"] = self.estimated_date_invoice
         return values
-