diff -u b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntitySerializationTest.php b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntitySerializationTest.php
--- b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntitySerializationTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/ContentEntitySerializationTest.php
@@ -59,7 +59,7 @@
     ])->save();
     FieldConfig::create([
       'entity_type' => $this->entityTypeId,
-      'field_name' => 'field_test_entity_reference',
+      'field_name' => $this->entityReferenceFieldName,
       'bundle' => $this->entityTypeId,
       'translatable' => TRUE,
     ])->save();