Don't test exact equality of the list: as long as it has the fields we expect, that's just fine. I added the user_id (as in database pkey) and it broke: no point testing what that comes out as: it's determined by the db.

tests/storage/test_registration.py

@@ -38,13 +38,12 @@ class RegistrationStoreTestCase(unittest.TestCase):
     @defer.inlineCallbacks
     def test_register(self):
         yield self.store.register(self.user_id, self.tokens[0], self.pwhash)
+        u = yield self.store.get_user_by_id(self.user_id)[0]
 
-        self.assertEquals(
         # TODO(paul): Surely this field should be 'user_id', not 'name'
         #  Additionally surely it shouldn't come in a 1-element list
-            [{"name": self.user_id, "password_hash": self.pwhash}],
-            (yield self.store.get_user_by_id(self.user_id))
-        )
+        self.assertEquals(self.user_id, u['name'])
+        self.assertEquals(self.pwhash, u['password_hash'])
 
         self.assertEquals(
             {"admin": 0,