diff --git a/core/modules/image/tests/src/Functional/ImageEffect/ConvertTest.php b/core/modules/image/tests/src/Functional/ImageEffect/ConvertTest.php
index e926f3cd67..5b9d8bc4c1 100644
--- a/core/modules/image/tests/src/Functional/ImageEffect/ConvertTest.php
+++ b/core/modules/image/tests/src/Functional/ImageEffect/ConvertTest.php
@@ -47,10 +47,12 @@ public function testConvertFileInRoot() {
     $this->assertFileExists($test_uri);
 
     // Execute the image style on the test image via a GET request.
+    $pipeline = \Drupal::service('image.processor')->createInstance('derivative')
+      ->setImageStyle(ImageStyle::load('image_effect_test'))
+      ->setSourceImageUri($test_uri);
     $derivative_uri = 'public://styles/image_effect_test/public/image-test-do.png.jpeg';
     $this->assertFileNotExists($derivative_uri);
-    $url = file_url_transform_relative($image_style->buildUrl($test_uri));
-    $this->drupalGet($this->getAbsoluteUrl($url));
+    $this->drupalGet($pipeline->getDerivativeImageUrl());
     $this->assertSession()->statusCodeEquals(200);
     $this->assertFileExists($derivative_uri);
   }
diff --git a/core/modules/image/tests/src/Kernel/DerivativeImageProcessTest.php b/core/modules/image/tests/src/Kernel/DerivativeImageProcessTest.php
index 98b277efb1..693731094e 100644
--- a/core/modules/image/tests/src/Kernel/DerivativeImageProcessTest.php
+++ b/core/modules/image/tests/src/Kernel/DerivativeImageProcessTest.php
@@ -13,11 +13,9 @@
 class DerivativeImageProcessTest extends KernelTestBase {
 
   /**
-   * Modules to enable.
-   *
-   * @var array
+   * {@inheritdoc}
    */
-  public static $modules = ['system', 'image', 'image_module_test'];
+  protected static $modules = ['system', 'image', 'image_module_test'];
 
   /**
    * The image processor service.