Schema dump/restore not restoring grants on the schema

   Just trying to find out if something is intended behaviour. When doing a schema filtered pg_dump the created dump file includes the grants on that specific schema (in our case a grant usage to a unprivleged user) but doing a pg_restore with a -n <schema name> does not restore that grant however individual grants on object within the filtered schema are restored.  But it's resulting in our unprivileged user not actually being able to access the limited number of tables it should be able to as the grant usage on the schema itself is being lost.

example

in template1:

create database backuptest;

create database restoretest;

create role testuser with login password 'password';

in backuptest;

create schema testschema

create table testschema.stuff (id integer not null);

grant usage on testschema to testuser;

grant insert,update,delete,select on testschema.stuff to testuser;

pg_dump -n testschema -d backuptest -U postgres -h localhost -F c -f test.backup

pg_restore -U postgres -d restoretest -h localhost -n testschema test.backup

In backuptest

backuptest=# \dn+
                            List of schemas
    Name    |  Owner   |  Access privileges   |      Description
------------+----------+----------------------+------------------------
 public     | postgres | postgres=UC/postgres+| standard public schema
            |          | =UC/postgres         |
 testschema | postgres | postgres=UC/postgres+|
            |          | testuser=U/postgres  |

in restore test:

restoretest=# \dn+
                            List of schemas
    Name    |  Owner   |  Access privileges   |      Description
------------+----------+----------------------+------------------------
 public     | postgres | postgres=UC/postgres+| standard public schema
            |          | =UC/postgres         |
 testschema | postgres |                      |
(2 rows)

How ever the table does have the grant in restoretest

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