diff --git a/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/HostedPro.php b/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/HostedPro.php
index a44c828f00b01eacf7992f509aec6e14f76cf68a..f7ee9fc20947e5c4a7bf0acc5bf2ff829aad87c0 100644
--- a/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/HostedPro.php
+++ b/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/HostedPro.php
@@ -16,5 +16,5 @@ class HostedPro extends PaypalIframe
      *
      * @var string
      */
-    protected $formBlockCc = '\Magento\Paypal\Test\Block\Form\HostedPro\Cc';
+    protected $formBlockCc = \Magento\Paypal\Test\Block\Form\HostedPro\Cc::class;
 }
diff --git a/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PayflowLink.php b/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PayflowLink.php
index 70c5c70bff216827af5f44538bbe4f2752bc0c02..c6b8d37dc3faa1634450e9152636171e44ec9139 100644
--- a/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PayflowLink.php
+++ b/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PayflowLink.php
@@ -16,5 +16,5 @@ class PayflowLink extends PaypalIframe
      *
      * @var string
      */
-    protected $formBlockCc = '\Magento\Paypal\Test\Block\Form\PayflowLink\Cc';
+    protected $formBlockCc = \Magento\Paypal\Test\Block\Form\PayflowLink\Cc::class;
 }
diff --git a/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PaymentsAdvanced.php b/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PaymentsAdvanced.php
index a560a0655836d8e6cc342cf3bd242325e177641e..bb80ab1ccfc3be3892813f744da23f56a0f11ac3 100644
--- a/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PaymentsAdvanced.php
+++ b/dev/tests/functional/tests/app/Magento/Paypal/Test/Block/Onepage/Payment/PaymentsAdvanced.php
@@ -16,5 +16,5 @@ class PaymentsAdvanced extends PaypalIframe
      *
      * @var string
      */
-    protected $formBlockCc = '\Magento\Paypal\Test\Block\Form\PaymentsAdvanced\Cc';
+    protected $formBlockCc = \Magento\Paypal\Test\Block\Form\PaymentsAdvanced\Cc::class;
 }