1 files changed, 6 insertions, 5 deletions
diff --git a/synapse/handlers/cas_handler.py b/synapse/handlers/cas_handler.py
index f3430c6713..bd35d1fb87 100644
--- a/synapse/handlers/cas_handler.py
+++ b/synapse/handlers/cas_handler.py
@@ -80,6 +80,11 @@ class CasHandler:
         # user-facing name of this auth provider
         self.idp_name = "CAS"
 
+        # we do not currently support brands/icons for CAS auth, but this is required by
+        # the SsoIdentityProvider protocol type.
+        self.idp_icon = None
+        self.idp_brand = None
+
         self._sso_handler = hs.get_sso_handler()
 
         self._sso_handler.register_identity_provider(self)
@@ -95,11 +100,7 @@ class CasHandler:
         Returns:
             The URL to use as a "service" parameter.
         """
-        return "%s%s?%s" % (
-            self._cas_service_url,
-            "/_matrix/client/r0/login/cas/ticket",
-            urllib.parse.urlencode(args),
-        )
+        return "%s?%s" % (self._cas_service_url, urllib.parse.urlencode(args),)
 
     async def _validate_ticket(
         self, ticket: str, service_args: Dict[str, str]