diff --git a/tests/unit/test_plugin_xep_0338.py b/tests/unit/test_plugin_xep_0338.py
new file mode 100644
index 00000000..babf21b1
--- /dev/null
+++ b/tests/unit/test_plugin_xep_0338.py
@@ -0,0 +1,139 @@
+#!/usr/bin/env python3
+
+# Libervia: an XMPP client
+# Copyright (C) 2009-2023 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from twisted.words.xish import domish
+
+from sat.plugins.plugin_xep_0338 import NS_JINGLE_GROUPING, XEP_0338
+from sat.tools.xml_tools import parse
+
+
+class TestXEP0338:
+    def test_parse_sdp(self, host):
+        """'group' attribute in SDP is correctly parsed"""
+        xep_0338 = XEP_0338(host)
+
+        call_data = {}
+        metadata = {}
+        media_type = "video"
+        application_data = {}
+        transport_data = {}
+
+        # SDP: a=group:BUNDLE audio video
+        attribute = "group"
+        parts = ["BUNDLE", "audio", "video"]
+
+        xep_0338._parse_sdp_a_trigger(
+            attribute,
+            parts,
+            call_data,
+            metadata,
+            media_type,
+            application_data,
+            transport_data,
+        )
+
+        assert metadata == {"group": {"BUNDLE": ["audio", "video"]}}
+
+    def test_generate_sdp(self, host):
+        """'group' attribute in SDP is correctly generated"""
+        xep_0338 = XEP_0338(host)
+
+        session = {"metadata": {"group": {"BUNDLE": ["audio", "video"]}}}
+        sdp_lines = []
+        local = True
+
+        xep_0338._generate_sdp_session_trigger(session, local, sdp_lines)
+
+        assert sdp_lines == ["a=group:BUNDLE audio video"]
+
+    def test_group_building(self, host, client):
+        """<group> element are built from session in session init trigger"""
+        xep_0338 = XEP_0338(host)
+
+        session = {
+            "jingle_elt": domish.Element((None, "jingle")),
+            "metadata": {"group": {"BUNDLE": ["audio", "video"]}},
+        }
+        content_name = "audio"
+        media = "audio"
+        media_data = {}
+        desc_elt = domish.Element((None, "description"))
+
+        xep_0338._jingle_session_init_trigger(
+            client, session, content_name, media, media_data, desc_elt
+        )
+
+        group_elts = list(session["jingle_elt"].elements(NS_JINGLE_GROUPING, "group"))
+        assert len(group_elts) == 1
+        group_elt = group_elts[0]
+        assert group_elt["semantics"] == "BUNDLE"
+        content_names = [
+            content_elt["name"]
+            for content_elt in group_elt.elements(NS_JINGLE_GROUPING, "content")
+        ]
+        assert content_names == ["audio", "video"]
+
+    def test_group_parsing(self, host, client):
+        """<group> elements are correctly parsed in jingle_handler trigger"""
+        xep_0338 = XEP_0338(host)
+
+        action = xep_0338._j.A_SESSION_INITIATE
+        session = {
+            "contents": ["audio", "video"],
+            "metadata": {},
+        }
+
+        raw_xml = """
+        <jingle xmlns='urn:xmpp:jingle:1'
+                action='session-initiate'
+                initiator='user@example.org/orchard'
+                sid='a73sjjvkla37jfea'>
+          <group xmlns='urn:xmpp:jingle:apps:grouping:0' semantics='BUNDLE'>
+            <content name='audio'/>
+            <content name='video'/>
+          </group>
+          <content creator='initiator' name='audio'>
+              <description xmlns='urn:xmpp:jingle:apps:rtp:1' media='audio'/>
+          </content>
+          <content creator='initiator' name='video'>
+              <description xmlns='urn:xmpp:jingle:apps:rtp:1' media='video'/>
+          </content>
+        </jingle>
+        """
+        session["jingle_elt"] = parse(raw_xml)
+
+        for content_elt in session["jingle_elt"].elements("urn:xmpp:jingle:1", "content"):
+            content_name = content_elt["name"]
+            desc_elt = next(
+                content_elt.elements("urn:xmpp:jingle:apps:rtp:1", "description")
+            )
+
+            xep_0338._jingle_handler_trigger(
+                client, action, session, content_name, desc_elt
+            )
+
+        group_elts = list(session["jingle_elt"].elements(NS_JINGLE_GROUPING, "group"))
+        assert len(group_elts) == 1
+        group_elt = group_elts[0]
+        assert group_elt["semantics"] == "BUNDLE"
+        content_names = [
+            content_elt["name"]
+            for content_elt in group_elt.elements(NS_JINGLE_GROUPING, "content")
+        ]
+        assert content_names == ["audio", "video"]