fix(test): Fixed tests for period closing voucher
diff --git a/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py b/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py
index 03d0918..dee8b16 100644
--- a/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py
+++ b/erpnext/accounts/doctype/period_closing_voucher/period_closing_voucher.py
@@ -75,7 +75,8 @@
 				"debit_in_account_currency": abs(net_pl_balance) if net_pl_balance > 0 else 0,
 				"debit": abs(net_pl_balance) if net_pl_balance > 0 else 0,
 				"credit_in_account_currency": abs(net_pl_balance) if net_pl_balance < 0 else 0,
-				"credit": abs(net_pl_balance) if net_pl_balance < 0 else 0
+				"credit": abs(net_pl_balance) if net_pl_balance < 0 else 0,
+				"cost_center": self.cost_center
 			}))
 
 		from erpnext.accounts.general_ledger import make_gl_entries