diff --git a/core/modules/system/tests/src/Functional/Theme/ThemeTokenTest.php b/core/modules/system/tests/src/Functional/Theme/ThemeTokenTest.php
index 1488c5b3e4..4ecfb10b0d 100644
--- a/core/modules/system/tests/src/Functional/Theme/ThemeTokenTest.php
+++ b/core/modules/system/tests/src/Functional/Theme/ThemeTokenTest.php
@@ -16,7 +16,7 @@ class ThemeTokenTest extends BrowserTestBase {
    *
    * @var array
    */
-  static public $modules = ['block'];
+  protected static $modules = ['block'];
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/system/tests/src/Kernel/PathHooksTest.php b/core/modules/system/tests/src/Kernel/PathHooksTest.php
index fcbb499979..497610e3e9 100644
--- a/core/modules/system/tests/src/Kernel/PathHooksTest.php
+++ b/core/modules/system/tests/src/Kernel/PathHooksTest.php
@@ -15,7 +15,7 @@ class PathHooksTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  static public $modules = ['system'];
+  protected static $modules = ['system'];
 
   /**
    * Test system_path_*() correctly clears caches.