AC-3764::Fixed the flaky tests

Author: glo71317

app/code/Magento/Checkout/Test/Mftf/ActionGroup/AssertMiniCartEmptyActionGroup.xml

@@ -15,6 +15,6 @@
 
         <dontSeeElement selector="{{StorefrontMinicartSection.productCount}}" stepKey="dontSeeMinicartProductCount"/>
         <click selector="{{StorefrontMinicartSection.showCart}}" stepKey="expandMinicart"/>
-        <see selector="{{StorefrontMinicartSection.minicartContent}}" userInput="You have no items in your shopping cart." stepKey="seeEmptyCartMessage"/>
+        <see selector="{{StorefrontMinicartSection.messageEmptyCart}}" userInput="You have no items in your shopping cart." stepKey="seeEmptyCartMessage"/>
     </actionGroup>
 </actionGroups>