diff -u b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityCloneTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityCloneTest.php
--- b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityCloneTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntityCloneTest.php
@@ -196,14 +196,24 @@
     // Clone the entity.
     $clone = clone $entity;
 
-    // Alter the uuid field of the cloned entity translation and assert that
-    // the change has not been propagated to the original entity. We first have
-    // to call the ::uuid() method on the original entity as it is going to
-    // cache the field value into the $entityKeysProperty of the entity object
-    // and we want to check that the cloned and the original entity aren't
-    // sharing the same reference to that local cache property.
-    $clone->{$entity->getEntityType()->getKey('uuid')}->value = 'test-change';
+    // Alter a non-translatable and a translatable entity key fields of the
+    // cloned entity and assert that retrieving the value through the entity
+    // keys local cache will be different for the cloned and the original
+    // entity.
+    // We first have to call the ::uuid() and ::label() method on the original
+    // entity as it is going to cache the field values into the $entityKeys and
+    // $translatableEntityKeys properties of the entity object and we want to
+    // check that the cloned and the original entity aren't sharing the same
+    // reference to those local cache properties.
+    $uuid_field_name = $entity->getEntityType()->getKey('uuid');
+    $this->assertFalse($entity->getFieldDefinition($uuid_field_name)->isTranslatable());
+    $clone->$uuid_field_name->value = 'test-change-uuid';
     $this->assertNotEquals($entity->uuid(), $clone->uuid());
+
+    $label_field_name = $entity->getEntityType()->getKey('label');
+    $this->assertTrue($entity->getFieldDefinition($label_field_name)->isTranslatable());
+    $clone->$label_field_name->value = 'test-change-label';
+    $this->assertNotEquals($entity->label(), $clone->label());
   }
 
 }