improve test

Author: engcom-Charlie

dev/tests/integration/testsuite/Magento/ConfigurableProduct/Block/Product/View/Type/MultiStoreConfigurableViewOnProductPageTest.php

@@ -182,10 +182,11 @@ public function assertProductConfig($expectedProducts): void
      */
     private function prepareConfigurableProduct(string $sku, string $storeCode): void
     {
-        $store = $this->storeManager->getStore($storeCode);
         $product = $this->productRepository->get($sku, false, null, true);
         $productToUpdate = $product->getTypeInstance()->getUsedProductCollection($product)
-            ->addStoreFilter($store)->setPageSize(1)->getFirstItem();
+            ->addStoreFilter($storeCode)
+            ->setPageSize(1)
+            ->getFirstItem();
 
         $this->assertNotEmpty($productToUpdate->getData(), 'Configurable product does not have a child');
         $this->executeInStoreContext->execute($storeCode, [$this, 'setProductDisabled'], $productToUpdate);