diff --git a/eu_cookie_compliance_gtm.module b/eu_cookie_compliance_gtm.module
index aa3d9b0..c0ecf4c 100644
--- a/eu_cookie_compliance_gtm.module
+++ b/eu_cookie_compliance_gtm.module
@@ -54,7 +54,7 @@ function eu_cookie_compliance_gtm_cookie_category_load(array $entities) {
 /**
  * Handles the form alter for the category form.
  */
-function eu_cookie_compliance_gtm_alter_category_form(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
+function eu_cookie_compliance_gtm_alter_category_form(&$form, FormStateInterface $form_state, $form_id) {
   $category = $form_state->getFormObject()->getEntity();
   $form['gtm_data'] = array(
     '#type' => 'textarea',
diff --git a/tests/src/Functional/LoadTest.php b/tests/src/Functional/LoadTest.php
index 691bf0b..5c618b7 100644
--- a/tests/src/Functional/LoadTest.php
+++ b/tests/src/Functional/LoadTest.php
@@ -17,7 +17,7 @@ class LoadTest extends BrowserTestBase {
    *
    * @var array
    */
-  public static $modules = ['eu_cookie_compliance_gtm'];
+  protected static $modules = ['eu_cookie_compliance_gtm'];
 
   /**
    * A user with permission to administer site configuration.
@@ -29,7 +29,7 @@ class LoadTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
+  protected function setUp(): void {
     parent::setUp();
     $this->user = $this->drupalCreateUser(['administer site configuration']);
     $this->drupalLogin($this->user);