diff --git a/zerver/tests/test_auth_backends.py b/zerver/tests/test_auth_backends.py
index e24183f7ea..b554f8e8ac 100644
--- a/zerver/tests/test_auth_backends.py
+++ b/zerver/tests/test_auth_backends.py
@@ -70,10 +70,10 @@ from zerver.lib.utils import generate_random_token
 from zerver.lib.validator import (
     Validator,
     check_bool,
-    check_dict,
     check_dict_only,
     check_int,
     check_list,
+    check_none_or,
     check_string,
     validate_login_email,
 )
@@ -3311,7 +3311,16 @@ class FetchAuthBackends(ZulipTestCase):
             self.assert_json_success(result)
             checker = check_dict_only([
                 ('authentication_methods', check_dict_only(authentication_methods_list)),
-                ('external_authentication_methods', check_list(check_dict(), length=len(external_auth_methods))),
+                ('external_authentication_methods', check_list(
+                    check_dict_only([
+                        ('display_icon', check_none_or(check_string)),
+                        ('display_name', check_string),
+                        ('login_url', check_string),
+                        ('name', check_string),
+                        ('signup_url', check_string),
+                    ]),
+                    length=len(external_auth_methods)
+                )),
                 ('email_auth_enabled', check_bool),
                 ('is_incompatible', check_bool),
                 ('require_email_format_usernames', check_bool),