diff --git a/tests/src/Functional/HtmlMailTest.php b/tests/src/Functional/HtmlMailTest.php
index 6924c36..ff0367e 100644
--- a/tests/src/Functional/HtmlMailTest.php
+++ b/tests/src/Functional/HtmlMailTest.php
@@ -24,12 +24,13 @@ class HtmlMailTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
+  protected function setUp(): void {
     parent::setUp();
   }
 
   /**
    * Dummy test to satisfy DrupalCI.
+   * @doesNotPerformAssertions
    */
   public function testHello() {
   }