diff --git a/core/modules/locale/tests/src/Kernel/LocalePrepareDirectoryTest.php b/core/modules/locale/tests/src/Kernel/LocalePrepareDirectoryTest.php
index 16f22c3a93..1582dc0175 100644
--- a/core/modules/locale/tests/src/Kernel/LocalePrepareDirectoryTest.php
+++ b/core/modules/locale/tests/src/Kernel/LocalePrepareDirectoryTest.php
@@ -15,7 +15,7 @@ class LocalePrepareDirectoryTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['language', 'locale', 'system'];
+  protected static $modules = ['language', 'locale', 'system'];
 
   /**
    * Checks if a translations directory gets created.
@@ -28,7 +28,7 @@ public function testPrepareDirectory() {
       ->set('translation.use_source', LOCALE_TRANSLATION_USE_SOURCE_LOCAL)
       ->save();
 
-    $this->assertDirectoryNotExists($directory);
+    $this->assertDirectoryDoesNotExist($directory);
     locale_prepare_translations_directory();
     $this->assertDirectoryExists($directory);
   }