fixed error

Author: Usik2203

app/code/Magento/Checkout/Test/Mftf/Test/StorefrontCheckoutWithDifferentShippingAndBillingAddressAndProductWithTierPricesTest.xml

@@ -65,8 +65,7 @@
 
         <!-- Fill the Estimate Shipping and Tax section -->
         <actionGroup ref="CheckoutFillEstimateShippingAndTaxActionGroup" stepKey="fillEstimateShippingAndTaxFields"/>
-        <click selector="{{CheckoutCartSummarySection.proceedToCheckout}}" stepKey="goToCheckout"/>
-        <waitForPageLoad stepKey="waitForPageToLoad"/>
+        <actionGroup ref="StorefrontClickProceedToCheckoutActionGroup" stepKey="goToCheckout"/>
 
         <!-- Fill the guest form -->
         <actionGroup ref="FillGuestCheckoutShippingAddressWithCountryActionGroup" stepKey="fillGuestForm">

app/code/Magento/Checkout/Test/Mftf/Test/StorefrontCheckoutWithDifferentShippingAndBillingAddressAndRegisterCustomerAfterCheckoutTest.xml

@@ -52,8 +52,7 @@
 
         <!-- Fill the Estimate Shipping and Tax section -->
         <actionGroup ref="CheckoutFillEstimateShippingAndTaxActionGroup" stepKey="fillEstimateShippingAndTaxFields"/>
-        <click selector="{{CheckoutCartSummarySection.proceedToCheckout}}" stepKey="goToCheckout"/>
-        <waitForPageLoad stepKey="waitForPageToLoad"/>
+        <actionGroup ref="StorefrontClickProceedToCheckoutActionGroup" stepKey="goToCheckout"/>
 
         <!-- Fill the guest form -->
         <actionGroup ref="FillGuestCheckoutShippingAddressFormActionGroup" stepKey="fillGuestForm">