diff --git a/src/Application.php b/src/Application.php
index 27a70a4..34ae4f6 100644
--- a/src/Application.php
+++ b/src/Application.php
@@ -12,7 +12,6 @@
 namespace Ahc\Cli;
 
 use Ahc\Cli\Exception\InvalidArgumentException;
-use Ahc\Cli\Helper\InflectsString;
 use Ahc\Cli\Helper\OutputHelper;
 use Ahc\Cli\Input\Command;
 use Ahc\Cli\IO\Interactor;
@@ -46,7 +45,7 @@ class Application
     public static $locale = 'en';
 
     /**
-     * list of translations for each supported locale
+     * list of translations for each supported locale.
      *
      * @var array<string, array>
      *
diff --git a/src/Helper/OutputHelper.php b/src/Helper/OutputHelper.php
index 00e2af7..9c68d62 100644
--- a/src/Helper/OutputHelper.php
+++ b/src/Helper/OutputHelper.php
@@ -100,7 +100,7 @@ public function printTrace(Throwable $e): void
             $traceStr .= "  <comment>$i)</end> <red>$symbol</end><comment>($args)</end>";
             if ('' !== $trace['file']) {
                 $file      = realpath($trace['file']);
-                $traceStr .= "<eol/>     <yellow>" . t('at') . " $file</end><white>:{$trace['line']}</end><eol/>";
+                $traceStr .= '<eol/>     <yellow>' . t('at') . " $file</end><white>:{$trace['line']}</end><eol/>";
             }
         }
 
diff --git a/tests/ApplicationTest.php b/tests/ApplicationTest.php
index 083f4c9..59127aa 100644
--- a/tests/ApplicationTest.php
+++ b/tests/ApplicationTest.php
@@ -338,9 +338,9 @@ public function test_default_translations()
     public function test_custom_translations(): void
     {
         Application::addLocale('fr', [
-            'Show version' => 'Afficher la version',
-            '%1$s [default: %2$s]' => '%1$s [par défaut: %2$s]',
-            'Command "%s" already added' => 'La commande "%s" a déjà été ajoutée'
+            'Show version'               => 'Afficher la version',
+            '%1$s [default: %2$s]'       => '%1$s [par défaut: %2$s]',
+            'Command "%s" already added' => 'La commande "%s" a déjà été ajoutée',
         ], true);
 
         $this->assertSame('Afficher la version', t('Show version'));
@@ -355,8 +355,8 @@ public function test_app_translated()
     {
         $app = $this->newApp('test');
         $app->addLocale('fr', [
-            'Show version' => 'Afficher la version',
-            'Verbosity level' => 'Niveau de verbocité',
+            'Show version'         => 'Afficher la version',
+            'Verbosity level'      => 'Niveau de verbocité',
             '%1$s [default: %2$s]' => '%s [par défaut: %s]',
         ], true);
         $app->command('rmdir');