diff --git a/tests/phpunit/CiviBackdrop/HookTest.php b/tests/phpunit/CiviBackdrop/HookTest.php
index a4f179c..5fd9472 100644
--- a/tests/phpunit/CiviBackdrop/HookTest.php
+++ b/tests/phpunit/CiviBackdrop/HookTest.php
@@ -8,7 +8,7 @@
    * @package CiviBackdrop
    * @group e2e
    */
-  class HookTest extends \PHPUnit_Framework_TestCase implements EndToEndInterface {
+  class HookTest extends \PHPUnit\Framework\TestCase implements EndToEndInterface {
 
     public function testFoo() {
       $arg1 = 'hello';
diff --git a/tests/phpunit/CiviBackdrop/PHPVersionTest.php b/tests/phpunit/CiviBackdrop/PHPVersionTest.php
index e3b4174..00e116a 100644
--- a/tests/phpunit/CiviBackdrop/PHPVersionTest.php
+++ b/tests/phpunit/CiviBackdrop/PHPVersionTest.php
@@ -4,7 +4,7 @@
 
 use Civi\Test\EndToEndInterface;
 
-class PhpVersionTest extends \PHPUnit_Framework_TestCase implements EndToEndInterface {
+class PhpVersionTest extends \PHPUnit\Framework\TestCase implements EndToEndInterface {
 
   /**
    * CIVICRM_DRUPAL_PHP_MINIMUM (civicrm.module) should match MINIMUM_PHP_VERSION (CRM/Upgrade/Form.php).