diff --git a/checkbox-ng/plainbox/impl/exporter/test_xlsx.py b/checkbox-ng/plainbox/impl/exporter/test_xlsx.py
new file mode 100644
index 0000000000..a276506825
--- /dev/null
+++ b/checkbox-ng/plainbox/impl/exporter/test_xlsx.py
@@ -0,0 +1,54 @@
+# This file is part of Checkbox.
+#
+# Copyright 2024 Canonical Ltd.
+# Written by:
+#   Pierre Equoy <pierre.equoy@canonical.com>
+#
+# Checkbox is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3,
+# as published by the Free Software Foundation.
+#
+# Checkbox is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Checkbox.  If not, see <http://www.gnu.org/licenses/>.
+
+from collections import OrderedDict
+from unittest import TestCase
+from unittest.mock import MagicMock, ANY
+
+from plainbox.impl.exporter.xlsx import XLSXSessionStateExporter
+
+
+class XLSXSessionStateExporterTests(TestCase):
+    def test_write_job(self):
+        self_mock = MagicMock()
+        # tree = {"Uncategorised": {"job1": {}}}
+        tree = {"job1": {}}
+        result_map = {
+            "job1": OrderedDict(
+                [
+                    ("summary", "job1"),
+                    ("category_id", "com.canonical.plainbox::uncategorised"),
+                    ("outcome", "pass"),
+                    ("plugin", "shell"),
+                    ("io_log", ""),
+                    ("comments", ""),
+                    ("command", 'echo "This is job1"'),
+                    ("certification_status", "non-blocker"),
+                ]
+            ),
+            "Uncategorised": {
+                "category_status": "pass",
+                "plugin": "local",
+                "summary": "Uncategorised",
+            },
+        }
+        XLSXSessionStateExporter._write_job(self_mock, tree, result_map, 2)
+        # self_mock.worksheet3.write.assert_called()
+        self_mock.worksheet3.write.assert_any_call(ANY, ANY, "", ANY)
+        # self_mock.worksheet3.write.assert_called_with(ANY, ANY, "", ANY)
+        # self.assertEqual(self_mock.worksheet3.write.call_count, 2)