Issue #2392281 by alexpott: system.module is included in our PHPUnit tests

core/tests/Drupal/Tests/Core/Extension/ModuleHandlerTest.php

@@ -297,8 +297,8 @@ public function testImplementsHookModuleEnabled() {
     $this->moduleHandler->addModule('module_handler_test_added', 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_added');
     $this->assertTrue($this->moduleHandler->implementsHook('module_handler_test_added', 'hook'), 'Runtime added module with implementation in include found.');
 
-    $this->moduleHandler->addModule('system', 'core/modules/system');
-    $this->assertFalse($this->moduleHandler->implementsHook('system', 'hook', array(TRUE)), 'Missing implementation not found.');
+    $this->moduleHandler->addModule('module_handler_test_no_hook', 'core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_added');
+    $this->assertFalse($this->moduleHandler->implementsHook('module_handler_test_no_hook', 'hook', array(TRUE)), 'Missing implementation not found.');
   }
 
   /**

core/tests/Drupal/Tests/Core/Extension/modules/module_handler_test_no_hook/module_handler_test_no_hook.info.yml

+name: module handler test no hook
+type: module
+description: 'Test module used to test modules that do not implement a hook.'
+package: Testing
+version: VERSION
+core: 8.x