Help with DBus Tests Failing for Python Package

[Jaft]

I'm attempting to package the Python package DasBus 
(https://github.com/rhinstaller/dasbus/) and the tests, when it tries to test 
by making DBus calls, are failing.

For specificity, the error output is:

> test_additional_arguments (tests.test_dbus.DBusExampleTestCase)
> Call a DBus method. ... **
> GLib-GIO:ERROR:../glib-2.70.2/gio/gtestdbus.c:667:start_daemon: assertion 
> failed (error == NULL): Failed to execute child process “dbus-daemon” (No 
> such file or directory) (g-exec-error-quark, 8)
> Bail out! GLib-GIO:ERROR:../glib-2.70.2/gio/gtestdbus.c:667:start_daemon: 
> assertion failed (error == NULL): Failed to execute child process 
> “dbus-daemon” (No such file or directory) (g-exec-error-quark, 8)
> error: in phase 'check': uncaught exception:
> %exception #<&invoke-error program: "python" arguments: ("-c" "import 
> setuptools, tokenize;__file__='setup.py';f=getattr(tokenize, 'open', 
> open)(__file__);code=f.read().replace('\r\n', 
> '\n');f.close();exec(compile(code, __file__, 'exec'))" "test") exit-status: 
> #f term-signal: 6 stop-signal: #f>

I tried using ~xorg-server-for-tests~ and initializing the server before the 
=check= phase but I'm still running into the same error.

Would anyone know what might be a cause?



> (define-public python-dasbus
>   (package
>     (name          "python-dasbus")
>     (version       "1.7")
>     (source        (origin
>                      (method url-fetch)
>                      (uri    (pypi-uri "dasbus" version))
>                      (sha256 (base32
>                                
>"1xmn6q00v3kif5q8jcq6vi84k6xb97s2ry5rgdgyxs6z3a20v1d8"))))
>     (build-system  python-build-system)
>     (arguments     (list #:phases #~(modify-phases %standard-phases
>                                       (add-before 'check 'start-xserver
>                                         (lambda _
>                                           (system "Xvfb :1 &")
>                                           (setenv "DISPLAY" ":1"))))))
>     (inputs        (list python python-pygobject))
>     (native-inputs (list xorg-server-for-tests))
>     (home-page     "https://github.com/rhinstaller/dasbus";)
>     (synopsis      "DBus library in Python 3")
>     (description   "DBus library in Python 3")
>     (license       #f)))