diff --git a/test/invoice_amount.sql b/test/invoice_amount.sql
index a60a0cd..3c12009 100644
--- a/test/invoice_amount.sql
+++ b/test/invoice_amount.sql
@@ -64,10 +64,10 @@ values (7, 1, 'Contact', 'XX555', '', '777-777-777', 'c@c', '', '', '', '', '',
 ;
 
 insert into invoice (invoice_id, company_id, invoice_number, invoice_date, contact_id, currency_code, payment_method_id)
-values ( 8, 1, 'I1', current_date, 7, 'EUR', '111')
-     , ( 9, 1, 'I2', current_date, 7, 'EUR', '111')
-     , (10, 1, 'I3', current_date, 7, 'EUR', '111')
-     , (11, 1, 'I4', current_date, 7, 'EUR', '111')
+values ( 8, 1, 'I1', current_date, 7, 'EUR', 111)
+     , ( 9, 1, 'I2', current_date, 7, 'EUR', 111)
+     , (10, 1, 'I3', current_date, 7, 'EUR', 111)
+     , (11, 1, 'I4', current_date, 7, 'EUR', 111)
 ;
 
 insert into invoice_product (invoice_product_id, invoice_id, name, price, quantity, discount_rate)