i am trying to write a functional test for my module that ships a views display extender but it already fails at installing my module.

in my module.install file i have these lines that will add my display extender to views.settings config:

function my_module_install() {
  // Enable display extender.
  $config = \Drupal::service('config.factory')->getEditable('views.settings');
  $display_extenders = $config->get('display_extenders') ?: [];
  $display_extenders[] = 'my_display_extender';
  $config->set('display_extenders', $display_extenders);

And i have this simple test that extends ViewsTestBase


namespace Drupal\Tests\my_module\Functional;

use Drupal\Tests\views\Functional\ViewTestBase;
use Drupal\Tests\node\Traits\ContentTypeCreationTrait;
use Drupal\Tests\node\Traits\NodeCreationTrait;

 * Test description.
 * @group my_module
class MyModuleTests extends ViewTestBase {

   * {@inheritdoc}
  protected $defaultTheme = 'olivero';

   * {@inheritdoc}
  protected static $modules = [

   * {@inheritdoc}
  public static $testViews = [

   * {@inheritdoc}
  protected function setUp($import_test_views = TRUE, $modules = ['views_test_config']): void {
    parent::setUp($import_test_views, ['my_module_tests']);

    $account = $this->drupalCreateUser(['access content']);
    // ...

   * Assert that the my_module installed correctly.
  public function testModuleInstalls() {
    // If we get here, then the module was successfully installed during the
    // setUp phase without throwing any Exceptions. Assert that TRUE is true,
    // so at least one assertion runs, and then exit.
    $this->assertTrue(TRUE, 'Module installed correctly.');


But the test fails at the install hook

Drupal\Tests\my_module\Functional\MyModuleTests::testModuleInstalls web\modules\custom\my_module\my_module.install:20

Drupal\Core\Config\Schema\SchemaIncompleteException: No schema for views.settings

And i am having a hard time trying to fix it or even understand why, the schema for views.settings is existent at core/modules/views/config/schema/views.schema.yml
Why is it that i get the error? Shouldnt the "views" module be enabled as well?

What do i have to do in order to make it work?

  • What's line 20 of my_module.install doing? I'm assuming something with Views but might be useful to see Commented Jun 3 at 12:44
  • Sorry, line 20 of my_module.install is $config->save() from the lines i posted in the question
    – john Smith
    Commented Jun 3 at 13:17

1 Answer 1


Okay i found the issue, i did not have the dependency to views module in the my_module.info.yml

after adding

  - drupal:views

the error disappeared and the tests were successfull

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