MAGETWO-67106: Unstable Automated test Magento\Paypal\Test\TestCase\InContextExpressCheckoutFromShoppingCartTest failed on variation InContextExpressCheckoutFromShoppingCartTestVariation1

Author: iivashchenko

dev/tests/functional/tests/app/Magento/Checkout/Test/Block/Cart.php

@@ -62,7 +62,7 @@ class Cart extends Block
      *
      * @var string
      */
-    protected $inContextPaypalCheckoutButton = 'ul.checkout-methods-items a[data-action="paypal-express-in-context-checkout"]';
+    protected $inContextPaypalCheckoutButton = 'ul.checkout-methods-items a[data-action="paypal-in-context-checkout"]';
 
     /**
      * Locator value for "Check out with Braintree PayPal" button.
@@ -184,6 +184,7 @@ public function paypalCheckout()
      */
     public function inContextPaypalCheckout()
     {
+        $this->waitForCheckoutButton();
         $this->_rootElement->find($this->inContextPaypalCheckoutButton)->click();
         $this->browser->selectWindow();
         $this->waitForFormLoaded();