diff --git a/core/modules/system/tests/modules/taxonomy_test/taxonomy_test.info.yml b/core/modules/system/tests/modules/taxonomy_test/taxonomy_test.info.yml
deleted file mode 100644
index 098470d..0000000
--- a/core/modules/system/tests/modules/taxonomy_test/taxonomy_test.info.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-name: 'Taxonomy test module'
-description: '"Tests functions and hooks not used in core".'
-package: Testing
-version: VERSION
-core: 8.x
-hidden: true
-dependencies:
-  - taxonomy
diff --git a/core/modules/system/tests/modules/taxonomy_test/taxonomy_test.install b/core/modules/system/tests/modules/taxonomy_test/taxonomy_test.install
deleted file mode 100644
index d5c94da..0000000
--- a/core/modules/system/tests/modules/taxonomy_test/taxonomy_test.install
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-/**
- * @file
- * Install, update and uninstall functions for the taxonomy_test module.
- */
-
-/**
- * Implements hook_schema().
- */
-function taxonomy_test_schema() {
-  $schema['taxonomy_term_antonym'] = array(
-    'description' => 'Stores term antonym.',
-    'fields' => array(
-      'tid' => array(
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-        'description' => 'The {taxonomy_term_data}.tid of the term.',
-      ),
-      'name' => array(
-        'type' => 'varchar',
-        'length' => 255,
-        'not null' => TRUE,
-        'default' => '',
-        'description' => 'The name of the antonym.',
-      ),
-    ),
-    'primary key' => array('tid'),
-  );
-
-  return $schema;
-}