diff --git a/core/modules/locale/config/locale.settings.yml b/core/modules/locale/config/locale.settings.yml
index ed6de7d..52c87ab 100644
--- a/core/modules/locale/config/locale.settings.yml
+++ b/core/modules/locale/config/locale.settings.yml
@@ -1,4 +1,3 @@
 translation:
   check_disabled: false
   default_server_pattern: 'http://ftp.drupal.org/files/translations/%core/%project/%project-%version.%language.po'
-  test_system_info_alter: false
diff --git a/core/modules/locale/lib/Drupal/locale/Tests/LocaleCompareTest.php b/core/modules/locale/lib/Drupal/locale/Tests/LocaleCompareTest.php
index 0a19330..68084f8 100644
--- a/core/modules/locale/lib/Drupal/locale/Tests/LocaleCompareTest.php
+++ b/core/modules/locale/lib/Drupal/locale/Tests/LocaleCompareTest.php
@@ -46,9 +46,7 @@ class LocaleCompareTest extends WebTestBase {
     // Make the test modules look like a normal custom module. i.e. make the
     // modules not hidden. locale_test_system_info_alter() modifies the project
     // info of the locale_test and locale_test_disabled modules.
-    $config = config('locale.settings');
-    $config->set('translation.test_system_info_alter', TRUE);
-    $config->save();
+    variable_set('locale_translation_test_system_info_alter', TRUE);
 
     // Check if interface translation data is collected from hook_info.
     drupal_static_reset('locale_translation_project_list');
@@ -75,7 +73,7 @@ class LocaleCompareTest extends WebTestBase {
     $config->delete('translation.check_disabled');
 
     // Return the locale test modules back to their hidden state.
-    $config->delete('translation.test_system_info_alter');
+    variable_del('locale_translation_test_system_info_alter');
   }
 
 }
diff --git a/core/modules/locale/tests/modules/locale_test/locale_test.module b/core/modules/locale/tests/modules/locale_test/locale_test.module
index 373a981..6044a07 100644
--- a/core/modules/locale/tests/modules/locale_test/locale_test.module
+++ b/core/modules/locale/tests/modules/locale_test/locale_test.module
@@ -16,8 +16,7 @@ function locale_test_system_info_alter(&$info, $file, $type) {
   // By default the locale_test modules are hidden and have a project specified.
   // To test the module detection proces by locale_project_list() the
   // test modules should mimic a custom module. I.e. be non-hidden.
-  $config = config('locale.settings');
-  if (!$config->get('translation.test_system_info_alter')) {
+  if (!variable_get('locale_translation_test_system_info_alter', FALSE)) {
     return;
   }