magento-test/app/code/Magento/Sales/etc/webapi_rest/di.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Sales\Model\ResourceModel\Order">
        <plugin name="authorization" type="Magento\Sales\Model\ResourceModel\Order\Plugin\Authorization" />
    </type>
    <type name="Magento\Sales\Api\ShipmentRepositoryInterface">
        <plugin name="convert_blob_to_string" type="Magento\Sales\Plugin\ShippingLabelConverter" />
    </type>
    <type name="Magento\Framework\Reflection\DataObjectProcessor">
        <arguments>
            <argument name="processors" xsi:type="array">
                <item name="Magento\Sales\Model\Order\Item" xsi:type="object">Magento\Sales\Model\Order\Webapi\ChangeOutputArray\Proxy</item>
            </argument>
        </arguments>
    </type>
    <type name="Magento\Sales\Model\Service\InvoiceService">
        <plugin name="addTransactionCommentAfterCapture" type="Magento\Sales\Plugin\Model\Service\Invoice\AddTransactionCommentAfterCapture"/>
    </type>
</config>