diff --git a/tests/src/Unit/CriticalCssProviderTest.php b/tests/src/Unit/CriticalCssProviderTest.php
index 3a888b7..7bfd0f4 100644
--- a/tests/src/Unit/CriticalCssProviderTest.php
+++ b/tests/src/Unit/CriticalCssProviderTest.php
@@ -36,6 +36,7 @@ class CriticalCssProviderTest extends UnitTestCase {
    * {@inheritdoc}
    */
   protected function setUp(): void {
+    parent::setUp();
     $config_factory = $this->getConfigFactoryStub(
       [
         'critical_css_enabled.settings' => [