requests.exceptions.MissingSchema: Invalid URL '/token': No scheme supplied. Perhaps you meant https:///token?
self = <critiquebrainz.frontend.views.test.test_login.LoginViewsTestCase testMethod=test_login_oauth>
mock_requests = <requests_mock.mocker.Mocker object at 0x7f136961d2d0>

    @requests_mock.Mocker()
    def test_login_oauth(self, mock_requests):
        """ Tests that creating a new user, update MB username and login to CB updates MB username in CB db """
        row_id = 1111
    
        mock_requests.post("https://musicbrainz.org/oauth2/token", json={
          "access_token": "UF7GvG2pl70jTogIwOhD32BhI_aIevPF",
          "expires_in": 3600,
          "token_type": "Bearer",
          "refresh_token": "GjSCBBjp4fnbE0AKo3uFu9qq9K2fFm4u"
        })
    
        mock_requests.get("https://musicbrainz.org/oauth2/userinfo", json={
            "sub": "old-user-name",
            "metabrainz_user_id": row_id
        })
    
        response = self.client.get(url_for("login.musicbrainz"))
        params = parse_qs(urlparse(response.location).query)
>       response = self.client.get(
            url_for("login.musicbrainz_post", code="foobar", state=params["state"][0]),
            follow_redirects=True
        )

critiquebrainz/frontend/views/test/test_login.py:37: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/local/lib/python3.11/site-packages/werkzeug/test.py:1162: in get
    return self.open(*args, **kw)
/usr/local/lib/python3.11/site-packages/flask/testing.py:232: in open
    response = super().open(
/usr/local/lib/python3.11/site-packages/werkzeug/test.py:1116: in open
    response_parts = self.run_wsgi_app(request.environ, buffered=buffered)
/usr/local/lib/python3.11/site-packages/werkzeug/test.py:988: in run_wsgi_app
    rv = run_wsgi_app(self.application, environ, buffered=buffered)
/usr/local/lib/python3.11/site-packages/werkzeug/test.py:1264: in run_wsgi_app
    app_rv = app(environ, start_response)
/usr/local/lib/python3.11/site-packages/flask/app.py:1478: in __call__
    return self.wsgi_app(environ, start_response)
/usr/local/lib/python3.11/site-packages/flask/app.py:1458: in wsgi_app
    response = self.handle_exception(e)
/usr/local/lib/python3.11/site-packages/flask/app.py:1455: in wsgi_app
    response = self.full_dispatch_request()
/usr/local/lib/python3.11/site-packages/flask/app.py:869: in full_dispatch_request
    rv = self.handle_user_exception(e)
/usr/local/lib/python3.11/site-packages/flask/app.py:867: in full_dispatch_request
    rv = self.dispatch_request()
/usr/local/lib/python3.11/site-packages/flask/app.py:852: in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
critiquebrainz/frontend/login/__init__.py:39: in decorated
    return f(*args, **kwargs)
critiquebrainz/frontend/views/login.py:29: in musicbrainz_post
    user = mb_auth.get_user()
critiquebrainz/frontend/login/provider.py:73: in get_user
    s = self._service.get_auth_session(
/usr/local/lib/python3.11/site-packages/rauth/service.py:556: in get_auth_session
    session = self.get_session(self.get_access_token(method, **kwargs))
/usr/local/lib/python3.11/site-packages/rauth/service.py:541: in get_access_token
    r = self.get_raw_access_token(method, **kwargs)
/usr/local/lib/python3.11/site-packages/rauth/service.py:516: in get_raw_access_token
    self.access_token_response = session.request(method,
/usr/local/lib/python3.11/site-packages/rauth/session.py:358: in request
    return super(OAuth2Session, self).request(method, url, **req_kwargs)
/usr/local/lib/python3.11/site-packages/requests/sessions.py:575: in request
    prep = self.prepare_request(req)
/usr/local/lib/python3.11/site-packages/requests/sessions.py:484: in prepare_request
    p.prepare(
/usr/local/lib/python3.11/site-packages/requests/models.py:367: in prepare
    self.prepare_url(url, params)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <PreparedRequest [POST]>, url = '/token', params = OrderedDict()

    def prepare_url(self, url, params):
        """Prepares the given HTTP URL."""
        #: Accept objects that have string representations.
        #: We're unable to blindly call unicode/str functions
        #: as this will include the bytestring indicator (b'')
        #: on python 3.x.
        #: https://github.com/psf/requests/pull/2238
        if isinstance(url, bytes):
            url = url.decode("utf8")
        else:
            url = str(url)
    
        # Remove leading whitespaces from url
        url = url.lstrip()
    
        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
        # `data` etc to work around exceptions from `url_parse`, which
        # handles RFC 3986 only.
        if ":" in url and not url.lower().startswith("http"):
            self.url = url
            return
    
        # Support for unicode domain names and paths.
        try:
            scheme, auth, host, port, path, query, fragment = parse_url(url)
        except LocationParseError as e:
            raise InvalidURL(*e.args)
    
        if not scheme:
>           raise MissingSchema(
                f"Invalid URL {url!r}: No scheme supplied. "
                f"Perhaps you meant https://{url}?"
            )
E           requests.exceptions.MissingSchema: Invalid URL '/token': No scheme supplied. Perhaps you meant https:///token?

/usr/local/lib/python3.11/site-packages/requests/models.py:438: MissingSchema