diff --git a/tester/group_chat_tester.c b/tester/group_chat_tester.c
index a8d29303c..d5c5b427b 100644
--- a/tester/group_chat_tester.c
+++ b/tester/group_chat_tester.c
@@ -3062,9 +3062,6 @@ static void imdn_for_group_chat_room (void) {
 	linphone_im_notif_policy_enable_all(linphone_core_get_im_notif_policy(marie->lc));
 	linphone_im_notif_policy_enable_all(linphone_core_get_im_notif_policy(pauline->lc));
 	linphone_im_notif_policy_enable_all(linphone_core_get_im_notif_policy(chloe->lc));
-	linphone_config_set_bool(linphone_core_get_config(marie->lc), "misc", "enable_simple_group_chat_message_state", FALSE);
-	linphone_config_set_bool(linphone_core_get_config(pauline->lc), "misc", "enable_simple_group_chat_message_state", FALSE);
-	linphone_config_set_bool(linphone_core_get_config(chloe->lc), "misc", "enable_simple_group_chat_message_state", FALSE);
 
 	// Marie creates a new group chat room
 	const char *initialSubject = "Colleagues";
@@ -3147,6 +3144,79 @@ end:
 	linphone_core_manager_destroy(chloe);
 }
 
+static void aggregated_imdn_for_group_chat_room (void) {
+	LinphoneCoreManager *marie = linphone_core_manager_create("marie_rc");
+	LinphoneCoreManager *pauline = linphone_core_manager_create("pauline_rc");
+	LinphoneCoreManager *chloe = linphone_core_manager_create("chloe_rc");
+	bctbx_list_t *coresManagerList = NULL;
+	bctbx_list_t *participantsAddresses = NULL;
+	coresManagerList = bctbx_list_append(coresManagerList, marie);
+	coresManagerList = bctbx_list_append(coresManagerList, pauline);
+	coresManagerList = bctbx_list_append(coresManagerList, chloe);
+	bctbx_list_t *coresList = init_core_for_conference(coresManagerList);
+	start_core_for_conference(coresManagerList);
+	participantsAddresses = bctbx_list_append(participantsAddresses, linphone_address_new(linphone_core_get_identity(pauline->lc)));
+	participantsAddresses = bctbx_list_append(participantsAddresses, linphone_address_new(linphone_core_get_identity(chloe->lc)));
+	stats initialMarieStats = marie->stat;
+	stats initialPaulineStats = pauline->stat;
+	stats initialChloeStats = chloe->stat;
+
+	// Enable IMDN
+	linphone_im_notif_policy_enable_all(linphone_core_get_im_notif_policy(marie->lc));
+	linphone_im_notif_policy_enable_all(linphone_core_get_im_notif_policy(pauline->lc));
+	linphone_im_notif_policy_enable_all(linphone_core_get_im_notif_policy(chloe->lc));
+
+	// Marie creates a new group chat room
+	const char *initialSubject = "Colleagues";
+	LinphoneChatRoom *marieCr = create_chat_room_client_side(coresList, marie, &initialMarieStats, participantsAddresses, initialSubject, -1);
+	const LinphoneAddress *confAddr = linphone_chat_room_get_conference_address(marieCr);
+
+	// Check that the chat room is correctly created on Pauline's side and that the participants are added
+	LinphoneChatRoom *paulineCr = check_creation_chat_room_client_side(coresList, pauline, &initialPaulineStats, confAddr, initialSubject, 2, FALSE);
+
+	// Check that the chat room is correctly created on Chloe's side and that the participants are added
+	LinphoneChatRoom *chloeCr = check_creation_chat_room_client_side(coresList, chloe, &initialChloeStats, confAddr, initialSubject, 2, FALSE);
+
+	// Chloe begins composing a message
+	const char *chloeTextMessage = "Hello";
+	const char *chloeTextMessage2 = "Long time no talk";
+	const char *chloeTextMessage3 = "How are you?";
+	LinphoneChatMessage *chloeMessage = _send_message(chloeCr, chloeTextMessage);
+	LinphoneChatMessage *chloeMessage2 = _send_message(chloeCr, chloeTextMessage2);
+	LinphoneChatMessage *chloeMessage3 = _send_message(chloeCr, chloeTextMessage3);
+	BC_ASSERT_TRUE(wait_for_list(coresList, &marie->stat.number_of_LinphoneMessageReceived, initialMarieStats.number_of_LinphoneMessageReceived + 3, 3000));
+	BC_ASSERT_TRUE(wait_for_list(coresList, &pauline->stat.number_of_LinphoneMessageReceived, initialPaulineStats.number_of_LinphoneMessageReceived + 3, 3000));
+	LinphoneChatMessage *marieLastMsg = marie->stat.last_received_chat_message;
+	if (!BC_ASSERT_PTR_NOT_NULL(marieLastMsg))
+		goto end;
+	BC_ASSERT_STRING_EQUAL(linphone_chat_message_get_text(marieLastMsg), chloeTextMessage3);
+	LinphoneAddress *chloeAddr = linphone_address_new(linphone_core_get_identity(chloe->lc));
+	BC_ASSERT_TRUE(linphone_address_weak_equal(chloeAddr, linphone_chat_message_get_from_address(marieLastMsg)));
+	linphone_address_unref(chloeAddr);
+
+	// Mark the messages as read on Marie's and Pauline's sides
+	linphone_chat_room_mark_as_read(marieCr);
+	linphone_chat_room_mark_as_read(paulineCr);
+	BC_ASSERT_TRUE(wait_for_list(coresList, &chloe->stat.number_of_LinphoneMessageDisplayed, initialChloeStats.number_of_LinphoneMessageDisplayed + 1, 1000));
+	BC_ASSERT_EQUAL(chloe->stat.number_of_LinphoneMessageDeliveredToUser, 0, int, "%d");
+
+	linphone_chat_message_unref(chloeMessage3);
+	linphone_chat_message_unref(chloeMessage2);
+	linphone_chat_message_unref(chloeMessage);
+
+end:
+	// Clean db from chat room
+	linphone_core_manager_delete_chat_room(marie, marieCr, coresList);
+	linphone_core_manager_delete_chat_room(chloe, chloeCr, coresList);
+	linphone_core_manager_delete_chat_room(pauline, paulineCr, coresList);
+
+	bctbx_list_free(coresList);
+	bctbx_list_free(coresManagerList);
+	linphone_core_manager_destroy(marie);
+	linphone_core_manager_destroy(pauline);
+	linphone_core_manager_destroy(chloe);
+}
+
 static void find_one_to_one_chat_room (void) {
 	LinphoneCoreManager *marie = linphone_core_manager_create("marie_rc");
 	LinphoneCoreManager *pauline = linphone_core_manager_create("pauline_rc");
@@ -3333,6 +3403,7 @@ test_t group_chat_tests[] = {
 	TEST_NO_TAG("New unique one-to-one chatroom after both participants left", group_chat_room_new_unique_one_to_one_chat_room_after_both_participants_left),
 	TEST_NO_TAG("Unique one-to-one chatroom re-created from the party that deleted it, with inactive devices", group_chat_room_unique_one_to_one_chat_room_recreated_from_message_2),
 	TEST_NO_TAG("IMDN for group chat room", imdn_for_group_chat_room),
+	TEST_NO_TAG("Aggregated IMDN for group chat room", aggregated_imdn_for_group_chat_room),
 	TEST_NO_TAG("Find one to one chat room", find_one_to_one_chat_room),
 	TEST_NO_TAG("New device after group chat room creation", group_chat_room_new_device_after_creation)
 };