diff --git a/app/code/Magento/InstantPurchase/Model/InstantPurchaseOption.php b/app/code/Magento/InstantPurchase/Model/InstantPurchaseOption.php
index a780d9716bd94..14baa03d8b21b 100644
--- a/app/code/Magento/InstantPurchase/Model/InstantPurchaseOption.php
+++ b/app/code/Magento/InstantPurchase/Model/InstantPurchaseOption.php
@@ -19,22 +19,22 @@
 class InstantPurchaseOption
 {
     /**
-     * @var PaymentTokenInterface
+     * @var PaymentTokenInterface|null
      */
     private $paymentToken;
 
     /**
-     * @var AddressIn
+     * @var Address|null
      */
     private $shippingAddress;
 
     /**
-     * @var Address
+     * @var Address|null
      */
     private $billingAddress;
 
     /**
-     * @var ShippingMethodInterface
+     * @var ShippingMethodInterface|null
      */
     private $shippingMethod;
 
diff --git a/app/code/Magento/InstantPurchase/Model/InstantPurchaseOptionLoadingFactory.php b/app/code/Magento/InstantPurchase/Model/InstantPurchaseOptionLoadingFactory.php
index d1dc71b80d5d1..b203cfdad2221 100644
--- a/app/code/Magento/InstantPurchase/Model/InstantPurchaseOptionLoadingFactory.php
+++ b/app/code/Magento/InstantPurchase/Model/InstantPurchaseOptionLoadingFactory.php
@@ -100,7 +100,7 @@ public function create(
     /**
      * Loads customer address model by identifier.
      *
-     * @param $addressId
+     * @param int $addressId
      * @return Address
      */
     private function getAddress($addressId): Address
diff --git a/app/code/Magento/InstantPurchase/Model/ShippingMethodChoose/DeferredShippingMethodChooserPool.php b/app/code/Magento/InstantPurchase/Model/ShippingMethodChoose/DeferredShippingMethodChooserPool.php
index b3ec44888c981..5a43783ceea6a 100644
--- a/app/code/Magento/InstantPurchase/Model/ShippingMethodChoose/DeferredShippingMethodChooserPool.php
+++ b/app/code/Magento/InstantPurchase/Model/ShippingMethodChoose/DeferredShippingMethodChooserPool.php
@@ -32,7 +32,7 @@ public function get($type) : DeferredShippingMethodChooserInterface
     {
         if (!isset($this->choosers[$type])) {
             throw new \InvalidArgumentException(sprintf(
-                'Deferred shipping method chooser is not registered.',
+                'Deferred shipping method %s is not registered.',
                 $type
             ));
         }
diff --git a/app/code/Magento/InstantPurchase/PaymentMethodIntegration/IntegrationsManager.php b/app/code/Magento/InstantPurchase/PaymentMethodIntegration/IntegrationsManager.php
index 9c93febe0db36..3ad2e000e97d3 100644
--- a/app/code/Magento/InstantPurchase/PaymentMethodIntegration/IntegrationsManager.php
+++ b/app/code/Magento/InstantPurchase/PaymentMethodIntegration/IntegrationsManager.php
@@ -146,7 +146,7 @@ private function findIntegrations(int $storeId): array
      *    </instant_purchase>
      *
      * @param VaultPaymentInterface $paymentMethod
-     * @param $storeId
+     * @param int|string|null|\Magento\Store\Model\Store $storeId
      * @return bool
      */
     private function isIntegrationAvailable(VaultPaymentInterface $paymentMethod, $storeId): bool