1 files changed, 9 insertions, 0 deletions
diff --git a/tests/rest/client/v1/test_rooms.py b/tests/rest/client/v1/test_rooms.py
index fe741637f5..2f2ca74611 100644
--- a/tests/rest/client/v1/test_rooms.py
+++ b/tests/rest/client/v1/test_rooms.py
@@ -484,6 +484,15 @@ class RoomsCreateTestCase(RoomBase):
         self.render(request)
         self.assertEquals(400, channel.code)
 
+    def test_post_room_invitees_invalid_mxid(self):
+        # POST with invalid invitee, see https://github.com/matrix-org/synapse/issues/4088
+        # Note the trailing space in the MXID here!
+        request, channel = self.make_request(
+            "POST", "/createRoom", b'{"invite":["@alice:example.com "]}'
+        )
+        self.render(request)
+        self.assertEquals(400, channel.code)
+
 
 class RoomTopicTestCase(RoomBase):
     """ Tests /rooms/$room_id/topic REST events. """