diff --git a/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php b/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php
index c49072cff5..8d7782e299 100644
--- a/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php
+++ b/core/tests/Drupal/Tests/Core/Entity/EntityTypeManagerTest.php
@@ -272,7 +272,7 @@ public function testGetFormObjectInvalidOperation() {
    * @covers ::getHandler
    */
   public function testGetHandler() {
-    $class = get_class($this->getMockForAbstractClass(TestEntityHandler::class);
+    $class = get_class($this->getMockForAbstractClass(TestEntityHandlerBase::class));
     $apple = $this->prophesize(EntityTypeInterface::class);
     $apple->getHandlerClass('storage')->willReturn($class);
 
@@ -399,7 +399,7 @@ protected function getTestHandlerClass() {
 /**
  * Provides a test entity handler.
  */
-class TestEntityHandler extends EntityHandlerBase {
+abstract class TestEntityHandlerBase extends EntityHandlerBase {
 
   /**
    * Returns the value of the $moduleHandler property.