1 files changed, 1 insertions, 1 deletions
diff --git a/tests/rest/utils.py b/tests/rest/utils.py
index 25ed1388cf..579441fb4a 100644
--- a/tests/rest/utils.py
+++ b/tests/rest/utils.py
@@ -99,7 +99,7 @@ class RestTestCase(unittest.TestCase):
             "POST",
             "/register",
             json.dumps({
-                "user_id": user_id,
+                "user": user_id,
                 "password": "test",
                 "type": "m.login.password"
             }))