diff --git a/gnu/packages/matrix.scm b/gnu/packages/matrix.scm
index e2c27f5a4c..5f94eb2075 100644
--- a/gnu/packages/matrix.scm
+++ b/gnu/packages/matrix.scm
@@ -3,6 +3,8 @@
 ;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2020, 2021 Michael Rohleder <mike@rohleder.de>
 ;;; Copyright © 2020 Giacomo Leidi <goodoldpaul@autistici.org>
+;;; Copyright © 2022 Aleksandr Vityazev <avityazev@posteo.org>
+;;; Copyright © 2022 Morgan Smith <Morgan.J.Smith@outlook.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -24,6 +26,7 @@ (define-module (gnu packages matrix)
   #:use-module (gnu packages check)
   #:use-module (gnu packages crypto)
   #:use-module (gnu packages databases)
+  #:use-module (gnu packages glib)
   #:use-module (gnu packages monitoring)
   #:use-module (gnu packages python-build)
   #:use-module (gnu packages python-check)
@@ -257,25 +260,28 @@ (define-public pantalaimon
            (lambda* (#:key tests? inputs outputs #:allow-other-keys)
              (when tests?
                (add-installed-pythonpath inputs outputs)
-               (invoke "pytest" "-vv" "tests"))))
-         ;; XXX: The sanity check trips on optional GUI libraries for the
-         ;; panctl command.
-         (delete 'sanity-check))))
+               (invoke "pytest" "-vv" "tests")))))))
     (native-inputs
-     (list python-pytest python-faker python-pytest-aiohttp
-           python-aioresponses))
+     (list python-aioresponses
+           python-faker
+           python-pytest
+           python-pytest-aiohttp))
     (propagated-inputs
      (list python-aiohttp
            python-appdirs
            python-attrs
            python-cachetools
            python-click
+           python-dbus
            python-janus
            python-keyring
            python-logbook
            python-matrix-nio
+           python-notify2
            python-peewee
-           python-prompt-toolkit))
+           python-prompt-toolkit
+           python-pydbus
+           python-pygobject))
     (home-page "https://github.com/matrix-org/pantalaimon")
     (synopsis "Matrix proxy daemon that adds E2E encryption capabilities")
     (description