1 files changed, 5 insertions, 0 deletions
diff --git a/tests/config/test_oauth_delegation.py b/tests/config/test_oauth_delegation.py
index 35f7b85dc7..5c91031746 100644
--- a/tests/config/test_oauth_delegation.py
+++ b/tests/config/test_oauth_delegation.py
@@ -271,3 +271,8 @@ class MSC3861OAuthDelegation(TestCase):
         self.config_dict["session_lifetime"] = "24h"
         with self.assertRaises(ConfigError):
             self.parse_config()
+
+    def test_enable_3pid_changes_cannot_be_enabled(self) -> None:
+        self.config_dict["enable_3pid_changes"] = True
+        with self.assertRaises(ConfigError):
+            self.parse_config()