MC-37196: Admin: invoice order for customer

Author: ysapiga

dev/tests/integration/testsuite/Magento/Sales/Controller/Adminhtml/Order/Invoice/SaveTest.php

@@ -196,11 +196,14 @@ public function testAclNoAccess()
     /**
      * Checks that order protect code is not changing after invoice submitting
      *
+     * @magentoDataFixture Magento/Sales/_files/order.php
+     *
      * @return void
      */
     public function testOrderProtectCodePreserveAfterInvoiceSave(): void
     {
-        $order = $this->prepareRequest();
+        $order = $this->getOrder('100000001');
+        $this->prepareRequest([], ['order_id' => $order->getEntityId()]);
         $protectCode = $order->getProtectCode();
         $this->dispatch($this->uri);
         $invoicedOrder = $this->getOrder('100000001');