diff --git a/core/modules/config/src/Controller/ConfigController.php b/core/modules/config/src/Controller/ConfigController.php
index 4f101d6..389927f 100644
--- a/core/modules/config/src/Controller/ConfigController.php
+++ b/core/modules/config/src/Controller/ConfigController.php
@@ -177,7 +177,7 @@ public function diff($source_name, $target_name = NULL, $collection = NULL) {
 
     $build = [];
 
-    $build['#title'] = t('View changes of @config_file', ['@config_file' => $source_name]);
+    $build['#title'] = $this->t('View changes of @config_file', ['@config_file' => $source_name]);
     // Add the CSS for the inline diff.
     $build['#attached']['library'][] = 'system/diff';
 
@@ -187,8 +187,8 @@ public function diff($source_name, $target_name = NULL, $collection = NULL) {
         'class' => ['diff'],
       ],
       '#header' => [
-        ['data' => t('Active'), 'colspan' => '2'],
-        ['data' => t('Staged'), 'colspan' => '2'],
+        ['data' => $this->t('Active'), 'colspan' => '2'],
+        ['data' => $this->t('Staged'), 'colspan' => '2'],
       ],
       '#rows' => $this->diffFormatter->format($diff),
     ];
diff --git a/core/modules/config/src/Form/ConfigSync.php b/core/modules/config/src/Form/ConfigSync.php
index 2d8be27..8ae2af8 100644
--- a/core/modules/config/src/Form/ConfigSync.php
+++ b/core/modules/config/src/Form/ConfigSync.php
@@ -365,10 +365,10 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
         $batch = [
           'operations' => [],
           'finished' => [ConfigImporterBatch::class, 'finish'],
-          'title' => t('Synchronizing configuration'),
-          'init_message' => t('Starting configuration synchronization.'),
-          'progress_message' => t('Completed step @current of @total.'),
-          'error_message' => t('Configuration synchronization has encountered an error.'),
+          'title' => $this->t('Synchronizing configuration'),
+          'init_message' => $this->t('Starting configuration synchronization.'),
+          'progress_message' => $this->t('Completed step @current of @total.'),
+          'error_message' => $this->t('Configuration synchronization has encountered an error.'),
         ];
         foreach ($sync_steps as $sync_step) {
           $batch['operations'][] = [[ConfigImporterBatch::class, 'process'], [$config_importer, $sync_step]];