--- /dev/null
+<?php
+
+namespace Drupal\module_installer_config_test\Entity;
+
+use Drupal\Core\Config\Entity\ConfigEntityBase;
+
+/**
+ * Defines a configuration-based entity type used for testing.
+ *
+ * @ConfigEntityType(
+ * id = "test_config_type",
+ * label = @Translation("Test entity type"),
+ * handlers = {
+ * "list_builder" = "Drupal\Core\Entity\EntityListBuilder"
+ * },
+ * admin_permission = "administer modules",
+ * config_prefix = "type",
+ * entity_keys = {
+ * "id" = "id",
+ * "label" = "name"
+ * }
+ * )
+ */
+class TestConfigType extends ConfigEntityBase {
+}