diff --git a/addons/account/tests/test_account_move_in_invoice.py b/addons/account/tests/test_account_move_in_invoice.py
index 98cec3e105f..5080aea470f 100644
--- a/addons/account/tests/test_account_move_in_invoice.py
+++ b/addons/account/tests/test_account_move_in_invoice.py
@@ -823,7 +823,10 @@ class TestAccountMoveInInvoiceOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'BILL/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'BILL/2019/0043'}])
diff --git a/addons/account/tests/test_account_move_in_refund.py b/addons/account/tests/test_account_move_in_refund.py
index 241061a1bbc..22751e93fdd 100644
--- a/addons/account/tests/test_account_move_in_refund.py
+++ b/addons/account/tests/test_account_move_in_refund.py
@@ -823,7 +823,10 @@ class TestAccountMoveInRefundOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'RBILL/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'RBILL/2019/0043'}])
diff --git a/addons/account/tests/test_account_move_out_invoice.py b/addons/account/tests/test_account_move_out_invoice.py
index cadb7dc40ea..12837cc065c 100644
--- a/addons/account/tests/test_account_move_out_invoice.py
+++ b/addons/account/tests/test_account_move_out_invoice.py
@@ -967,7 +967,10 @@ class TestAccountMoveOutInvoiceOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'INV/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'INV/2019/0043'}])
diff --git a/addons/account/tests/test_account_move_out_refund.py b/addons/account/tests/test_account_move_out_refund.py
index 0fd9778c275..fcee11fa0a2 100644
--- a/addons/account/tests/test_account_move_out_refund.py
+++ b/addons/account/tests/test_account_move_out_refund.py
@@ -823,7 +823,10 @@ class TestAccountMoveOutRefundOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'RINV/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'RINV/2019/0043'}])