diff --git a/tests/src/Functional/TwigTweakTest.php b/tests/src/Functional/TwigTweakTest.php
index 5e07198..da403c0 100644
--- a/tests/src/Functional/TwigTweakTest.php
+++ b/tests/src/Functional/TwigTweakTest.php
@@ -30,7 +30,7 @@ final class TwigTweakTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'views',
diff --git a/tests/src/Kernel/AbstractExtractorTestCase.php b/tests/src/Kernel/AbstractExtractorTestCase.php
index 225a5ea..23ff8a6 100644
--- a/tests/src/Kernel/AbstractExtractorTestCase.php
+++ b/tests/src/Kernel/AbstractExtractorTestCase.php
@@ -25,7 +25,7 @@ abstract class AbstractExtractorTestCase extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'system',
diff --git a/tests/src/Kernel/BlockViewBuilderTest.php b/tests/src/Kernel/BlockViewBuilderTest.php
index 13383d4..19a079d 100644
--- a/tests/src/Kernel/BlockViewBuilderTest.php
+++ b/tests/src/Kernel/BlockViewBuilderTest.php
@@ -17,7 +17,7 @@ final class BlockViewBuilderTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'user',
diff --git a/tests/src/Kernel/CacheMetadataExtractorTest.php b/tests/src/Kernel/CacheMetadataExtractorTest.php
index 2416dac..f5ac1e1 100644
--- a/tests/src/Kernel/CacheMetadataExtractorTest.php
+++ b/tests/src/Kernel/CacheMetadataExtractorTest.php
@@ -3,13 +3,21 @@
 namespace Drupal\Tests\twig_tweak\Kernel;
 
 use Drupal\Core\Cache\CacheableMetadata;
+use Drupal\KernelTests\KernelTestBase;
 
 /**
  * A test for Cache Metadata Extractor service.
  *
  * @group twig_tweak
  */
-final class CacheMetadataExtractorTest extends AbstractExtractorTestCase {
+final class CacheMetadataExtractorTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'twig_tweak',
+  ];
 
   /**
    * Test callback.
diff --git a/tests/src/Kernel/EntityFormViewBuilderTest.php b/tests/src/Kernel/EntityFormViewBuilderTest.php
index fe5b756..db74c26 100644
--- a/tests/src/Kernel/EntityFormViewBuilderTest.php
+++ b/tests/src/Kernel/EntityFormViewBuilderTest.php
@@ -20,7 +20,7 @@ final class EntityFormViewBuilderTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'user',
diff --git a/tests/src/Kernel/EntityViewBuilderTest.php b/tests/src/Kernel/EntityViewBuilderTest.php
index 7a4912e..e294408 100644
--- a/tests/src/Kernel/EntityViewBuilderTest.php
+++ b/tests/src/Kernel/EntityViewBuilderTest.php
@@ -20,7 +20,7 @@ final class EntityViewBuilderTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'user',
diff --git a/tests/src/Kernel/FieldViewBuilderTest.php b/tests/src/Kernel/FieldViewBuilderTest.php
index d5feddc..fc8aea6 100644
--- a/tests/src/Kernel/FieldViewBuilderTest.php
+++ b/tests/src/Kernel/FieldViewBuilderTest.php
@@ -20,7 +20,7 @@ final class FieldViewBuilderTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'user',
diff --git a/tests/src/Kernel/ImageViewBuilderTest.php b/tests/src/Kernel/ImageViewBuilderTest.php
index ab43bef..a79f83f 100644
--- a/tests/src/Kernel/ImageViewBuilderTest.php
+++ b/tests/src/Kernel/ImageViewBuilderTest.php
@@ -19,7 +19,7 @@ final class ImageViewBuilderTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'user',
diff --git a/tests/src/Kernel/MenuViewBuilderTest.php b/tests/src/Kernel/MenuViewBuilderTest.php
index 09bdbaf..2a2eb68 100644
--- a/tests/src/Kernel/MenuViewBuilderTest.php
+++ b/tests/src/Kernel/MenuViewBuilderTest.php
@@ -15,7 +15,7 @@ final class MenuViewBuilderTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'user',
     'system',
diff --git a/tests/src/Kernel/RegionViewBuilderTest.php b/tests/src/Kernel/RegionViewBuilderTest.php
index a0d4ff6..edddbde 100644
--- a/tests/src/Kernel/RegionViewBuilderTest.php
+++ b/tests/src/Kernel/RegionViewBuilderTest.php
@@ -20,7 +20,7 @@ final class RegionViewBuilderTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'twig_tweak',
     'twig_tweak_test',
     'user',