diff --git a/intrastat_product/report/intrastat_product_report_xls.py b/intrastat_product/report/intrastat_product_report_xls.py
index 48ccb26..daa63b1 100644
--- a/intrastat_product/report/intrastat_product_report_xls.py
+++ b/intrastat_product/report/intrastat_product_report_xls.py
@@ -28,6 +28,10 @@ class IntrastatProductDeclarationXlsx(models.AbstractModel):
         return val
 
     def _get_template(self, declaration):
+        """
+        Return a dictionary that contains columns specifications
+        see: report_xlsx_helper / _write_line() method
+        """
 
         template = {
             "product": {
diff --git a/intrastat_product/tests/common.py b/intrastat_product/tests/common.py
index 6efb68b..4047ba6 100644
--- a/intrastat_product/tests/common.py
+++ b/intrastat_product/tests/common.py
@@ -1,5 +1,7 @@
 # Copyright 2021 ACSONE SA/NV
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+import xlrd
+from werkzeug.urls import url_encode
 
 from odoo.addons.intrastat_base.tests.common import IntrastatCommon
 
@@ -63,6 +65,10 @@ class IntrastatProductCommon(IntrastatCommon):
         cls.declaration_obj = cls.env["intrastat.product.declaration"]
         cls.position_obj = cls.env["account.fiscal.position"]
         cls.hs_code_computer = cls.env.ref("product_harmonized_system.84715000")
+        cls.report_obj = cls.env["ir.actions.report"]
+        cls.xls_declaration = cls.env[
+            "report.intrastat_product.product_declaration_xls"
+        ]
 
         cls.transport_rail = cls.env.ref("intrastat_product.intrastat_transport_2")
         cls.transport_road = cls.env.ref("intrastat_product.intrastat_transport_3")
@@ -72,6 +78,78 @@ class IntrastatProductCommon(IntrastatCommon):
         cls._init_fiscal_position()
         cls._init_products()
 
+    @classmethod
+    def _create_xls(cls, declaration=False):
+        """
+            Prepare the Excel report to be tested
+
+        :return: The Excel file
+        :rtype: bytes
+        """
+        report = cls.declaration.with_context(
+            active_ids=cls.declaration.ids
+        ).create_xls()
+        report_name = report.get("report_name")
+        cls.report = cls.report_obj._get_report_from_name(report_name)
+        datas = {
+            "context": {
+                "active_ids": [cls.declaration.id],
+            }
+        }
+        data = {}
+        encoded_data = "report/report_xlsx/" + report_name + "?" + url_encode(data)
+        datas["data"] = encoded_data
+        context = {
+            "active_model": cls.declaration._name,
+        }
+        if not declaration:
+            context.update({"computation_lines": True})
+        else:
+            context.update({"declaration_lines": True})
+        file_data = cls.xls_declaration.with_context(context).create_xlsx_report(
+            None, datas
+        )
+        return file_data
+
+    def check_xls(self, xls, declaration=False):
+        """
+            Check that the xls content correspond to computation/declaration
+            lines values
+
+        :param xls: the Excel file content
+        :type xls: bytes
+        :param declaration: By default, check computation lines, either declaration ones
+        :type declaration: bool, optional
+        """
+        book = xlrd.open_workbook(file_contents=xls)
+        sheet = book.sheet_by_index(0)
+        # Get the template used to build the Excel file lines
+        template = self.xls_declaration._get_template(self.declaration)
+        # Get the declaration lines or the computation ones
+        if not declaration:
+            declaration_lines = self.declaration.computation_line_ids
+            line_fields = self.declaration._xls_computation_line_fields()
+        else:
+            declaration_lines = self.declaration.declaration_line_ids
+            line_fields = self.declaration._xls_declaration_line_fields()
+        i = 0
+        # Iterate on each row beginning on third one (two headers)
+        for rx in range(3, sheet.nrows):
+            line = declaration_lines[i]
+            row = sheet.row(rx)
+            j = 0
+            dict_compare = dict()
+            for line_field in line_fields:
+                column_spec = template.get(line_field)
+                dict_compare.update(
+                    {row[j].value: column_spec.get("line").get("value")}
+                )
+                j += 1
+            for key, value in dict_compare.items():
+                value_eval = self.xls_declaration._eval(value, {"line": line})
+                self.assertEqual(key, value_eval)
+            i += 1
+
     @classmethod
     def _create_region(cls, vals=None):
         values = {
diff --git a/intrastat_product/tests/test_purchase_order.py b/intrastat_product/tests/test_purchase_order.py
index 236ffe7..88528e2 100644
--- a/intrastat_product/tests/test_purchase_order.py
+++ b/intrastat_product/tests/test_purchase_order.py
@@ -48,6 +48,14 @@ class TestIntrastatProductPurchase(IntrastatPurchaseCommon):
         self.declaration.generate_declaration()
         self._check_line_values(final=True)
 
+        # Check the Excel computation file
+        file_data = self._create_xls()
+        self.check_xls(file_data[0])
+
+        # Check the Excel declaration file
+        file_data = self._create_xls(True)
+        self.check_xls(file_data[0], True)
+
 
 class TestIntrastatProductPurchaseCase(TestIntrastatProductPurchase, SavepointCase):
     """Test Intrastat Purchase"""
diff --git a/intrastat_product/tests/test_sale_order.py b/intrastat_product/tests/test_sale_order.py
index 7c01f1b..aedfe7f 100644
--- a/intrastat_product/tests/test_sale_order.py
+++ b/intrastat_product/tests/test_sale_order.py
@@ -83,6 +83,14 @@ class TestIntrastatProductSale(IntrastatSaleCommon):
         self.declaration.generate_declaration()
         self._check_line_values(final=True)
 
+        # Check the Excel computation file
+        file_data = self._create_xls()
+        self.check_xls(file_data[0])
+
+        # Check the Excel declaration file
+        file_data = self._create_xls(True)
+        self.check_xls(file_data[0], True)
+
 
 class TestIntrastatProductSaleCase(TestIntrastatProductSale, SavepointCase):
     """Test Intrastat Sale"""