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
@@ -297,10 +297,10 @@
 
     // Retrieve the entity properties.
     $reflection = new \ReflectionClass($entity);
-    $properties_filter = \ReflectionProperty::IS_PUBLIC | \ReflectionProperty::IS_PROTECTED | \ReflectionProperty::IS_PRIVATE;
-    $properties_clone = $reflection->getProperties($properties_filter);
+    $properties = $reflection->getProperties(\ReflectionProperty::IS_PUBLIC | \ReflectionProperty::IS_PROTECTED | \ReflectionProperty::IS_PRIVATE);
+    $translation_unique_properties = ['activeLangcode', 'translationInitialize', 'fieldDefinitions', 'languages', 'langcodeKey', 'defaultLangcode', 'defaultLangcodeKey', 'validated', 'validationRequired', 'entityTypeId', 'typedData', 'cacheContexts', 'cacheTags', 'cacheMaxAge', '_serviceIds'];
 
-    foreach ($properties_clone as $property) {
+    foreach ($properties as $property) {
       // Modify each entity property on the clone and assert that the change is
       // not propagated to the original entity.
       $property->setAccessible(TRUE);
@@ -312,7 +312,6 @@
       // except for the properties that are unique for each entity translation
       // object.
       $property->setValue($translation, 'test-translation-cloning');
-      $translation_unique_properties = ['activeLangcode', 'translationInitialize', 'fieldDefinitions', 'languages', 'langcodeKey', 'defaultLangcode', 'defaultLangcodeKey', 'validated', 'validationRequired', 'entityTypeId', 'typedData', 'cacheContexts', 'cacheTags', 'cacheMaxAge', '_serviceIds'];
       // Using assertEquals or assertNotEquals here is dangerous as if the
       // assertion fails and the property for some reasons contains the entity
       // object e.g. the "typedData" property then the property will be