ClickHouse/tests/integration/test_mask_sensitive_info/configs/overrides.xml

<clickhouse>
    <display_secrets_in_show_and_select>1</display_secrets_in_show_and_select>

    <remote_servers>
        <test_shard_localhost>
            <shard>
                <replica>
                    <host>localhost</host>
                    <port>9000</port>
                </replica>
            </shard>
        </test_shard_localhost>
    </remote_servers>

    <named_collections>
        <named_collection_1/>
        <named_collection_2/>
        <named_collection_3>
            <user>user</user>
            <password>pass</password>
        </named_collection_3>
        <named_collection_4>
            <host></host>
        </named_collection_4>
        <named_collection_5>
            <host></host>
        </named_collection_5>
        <named_collection_6/>
    </named_collections>
</clickhouse>