Fix `/events/:event_id` deprecated API. (#6731)

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/unittest.py b/tests/unittest.py

index ddcd4becfe..b56e249386 100644
--- a/tests/unittest.py
+++ b/tests/unittest.py
@@ -463,7 +463,7 @@ class HomeserverTestCase(TestCase):
         # Create the user
         request, channel = self.make_request("GET", "/_matrix/client/r0/admin/register")
         self.render(request)
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, 200, msg=channel.result)
         nonce = channel.json_body["nonce"]
 
         want_mac = hmac.new(key=b"shared", digestmod=hashlib.sha1)