diff --git a/addons/l10n_account_edi_ubl_cii_tests/tests/common.py b/addons/l10n_account_edi_ubl_cii_tests/tests/common.py
index 1109706c9d3..bf0504f3a5b 100644
--- a/addons/l10n_account_edi_ubl_cii_tests/tests/common.py
+++ b/addons/l10n_account_edi_ubl_cii_tests/tests/common.py
@@ -225,7 +225,7 @@ class TestUBLCommon(AccountTestInvoicingCommon):
             account_move._generate_pdf_and_send_invoice(self.move_template)
         return account_move
 
-    def _assert_invoice_attachment(self, attachment, xpaths, expected_file):
+    def _assert_invoice_attachment(self, attachment, xpaths, expected_file_path):
         """
         Get attachment from a posted account.move, and asserts it's the same as the expected xml file.
         """
@@ -234,8 +234,9 @@ class TestUBLCommon(AccountTestInvoicingCommon):
         xml_content = base64.b64decode(attachment.with_context(bin_size=False).datas)
         xml_etree = self.get_xml_tree_from_string(xml_content)
 
-        expected_file_path = get_resource_path('l10n_account_edi_ubl_cii_tests', 'tests/test_files', expected_file)
-        expected_etree = etree.parse(expected_file_path).getroot()
+        expected_file = get_resource_path(self.test_module, 'tests/test_files', expected_file_path)
+        self.assertTrue(expected_file, "expected file not found")
+        expected_etree = etree.parse(expected_file).getroot()
 
         modified_etree = self.with_applied_xpath(
             expected_etree,
diff --git a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_cii_fr.py b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_cii_fr.py
index 6c40fa4103e..69c731f5ee5 100644
--- a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_cii_fr.py
+++ b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_cii_fr.py
@@ -182,7 +182,7 @@ class TestCIIFR(TestUBLCommon):
                         <PaymentReference>___ignore___</PaymentReference>
                 </xpath>
             ''',
-            expected_file='from_odoo/facturx_out_invoice.xml',
+            expected_file_path='from_odoo/facturx_out_invoice.xml',
         )
         self.assertEqual(attachment.name, "factur-x.xml")
         self._assert_imported_invoice_from_etree(invoice, attachment)
@@ -227,7 +227,7 @@ class TestCIIFR(TestUBLCommon):
                         <IssuerAssignedID>___ignore___</IssuerAssignedID>
                 </xpath>
             ''',
-            expected_file='from_odoo/facturx_out_refund.xml'
+            expected_file_path='from_odoo/facturx_out_refund.xml'
         )
         self.assertEqual(attachment.name, "factur-x.xml")
         self._assert_imported_invoice_from_etree(refund, attachment)
@@ -280,7 +280,7 @@ class TestCIIFR(TestUBLCommon):
                         <IssuerAssignedID>___ignore___</IssuerAssignedID>
                 </xpath>
             ''',
-            expected_file='from_odoo/facturx_out_invoice_tax_incl.xml'
+            expected_file_path='from_odoo/facturx_out_invoice_tax_incl.xml'
         )
 
     def test_encoding_in_attachment_facturx(self):
diff --git a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_au.py b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_au.py
index 594d9a393bd..21d1c8a1bac 100644
--- a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_au.py
+++ b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_au.py
@@ -109,7 +109,7 @@ class TestUBLAU(TestUBLCommon):
                     <attribute name="filename">{invoice.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/a_nz_out_invoice.xml',
+            expected_file_path='from_odoo/a_nz_out_invoice.xml',
         )
         self.assertEqual(attachment.name[-8:], "a_nz.xml")
         self._assert_imported_invoice_from_etree(invoice, attachment)
@@ -167,7 +167,7 @@ class TestUBLAU(TestUBLCommon):
                     <attribute name="filename">{refund.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/a_nz_out_refund.xml',
+            expected_file_path='from_odoo/a_nz_out_refund.xml',
         )
         self.assertEqual(attachment.name[-8:], "a_nz.xml")
         self._assert_imported_invoice_from_etree(refund, attachment)
diff --git a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_be.py b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_be.py
index ad675079684..bf66d37ff82 100644
--- a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_be.py
+++ b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_be.py
@@ -139,7 +139,7 @@ class TestUBLBE(TestUBLCommon, TestAccountMoveSendCommon):
                     <attribute name="filename">{invoice.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/bis3_out_invoice.xml',
+            expected_file_path='from_odoo/bis3_out_invoice.xml',
         )
         self.assertEqual(attachment.name[-12:], "ubl_bis3.xml")
         self._assert_imported_invoice_from_etree(invoice, attachment)
@@ -197,7 +197,7 @@ class TestUBLBE(TestUBLCommon, TestAccountMoveSendCommon):
                     <attribute name="filename">{refund.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/bis3_out_refund.xml',
+            expected_file_path='from_odoo/bis3_out_refund.xml',
         )
         self.assertEqual(attachment.name[-12:], "ubl_bis3.xml")
         self._assert_imported_invoice_from_etree(refund, attachment)
@@ -252,7 +252,7 @@ class TestUBLBE(TestUBLCommon, TestAccountMoveSendCommon):
                     <attribute name="filename">{invoice.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/bis3_out_invoice_public_admin.xml',
+            expected_file_path='from_odoo/bis3_out_invoice_public_admin.xml',
         )
 
     def test_rounding_price_unit(self):
diff --git a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_de.py b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_de.py
index e21ebd24d60..9adc376ed1a 100644
--- a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_de.py
+++ b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_de.py
@@ -121,7 +121,7 @@ class TestUBLDE(TestUBLCommon):
                     <attribute name="filename">{invoice.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/xrechnung_ubl_out_invoice.xml',
+            expected_file_path='from_odoo/xrechnung_ubl_out_invoice.xml',
         )
         self.assertEqual(attachment.name[-10:], "ubl_de.xml")
         self._assert_imported_invoice_from_etree(invoice, attachment)
@@ -179,7 +179,7 @@ class TestUBLDE(TestUBLCommon):
                     <attribute name="filename">{refund.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/xrechnung_ubl_out_refund.xml',
+            expected_file_path='from_odoo/xrechnung_ubl_out_refund.xml',
         )
         self.assertEqual(attachment.name[-10:], "ubl_de.xml")
         self._assert_imported_invoice_from_etree(refund, attachment)
diff --git a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_nl.py b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_nl.py
index f01c5fb9900..784753fe5fb 100644
--- a/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_nl.py
+++ b/addons/l10n_account_edi_ubl_cii_tests/tests/test_xml_ubl_nl.py
@@ -138,7 +138,7 @@ class TestUBLNL(TestUBLCommon):
                     <attribute name="filename">{invoice.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/nlcius_out_invoice.xml',
+            expected_file_path='from_odoo/nlcius_out_invoice.xml',
         )
         self.assertEqual(attachment.name[-10:], "nlcius.xml")
         self._assert_imported_invoice_from_etree(invoice, attachment)
@@ -196,7 +196,7 @@ class TestUBLNL(TestUBLCommon):
                     <attribute name="filename">{refund.invoice_pdf_report_id.name}</attribute>
                 </xpath>
             ''',
-            expected_file='from_odoo/nlcius_out_refund.xml',
+            expected_file_path='from_odoo/nlcius_out_refund.xml',
         )
         self.assertEqual(attachment.name[-10:], "nlcius.xml")
         self._assert_imported_invoice_from_etree(refund, attachment)