diff --git a/src/svgtinyps.php b/src/svgtinyps.php
index 549f926..b4597c0 100644
--- a/src/svgtinyps.php
+++ b/src/svgtinyps.php
@@ -48,7 +48,7 @@ function showHelp()
     echo 'Usage: svgtinyps [options] [command] [input-file] [output-file]'.PHP_EOL;
     echo PHP_EOL;
     echo 'Options:'.PHP_EOL;
-    echo "  -v, --verbose  Enable verbose mode".PHP_EOL;
+    echo '  -v, --verbose  Enable verbose mode'.PHP_EOL;
     echo PHP_EOL;
     echo 'Commands:'.PHP_EOL;
     echo '  convert [input] [output]  - Convert SVG file'.PHP_EOL;
@@ -57,7 +57,7 @@ function showHelp()
     echo '  help                      - Show this help information'.PHP_EOL;
     echo PHP_EOL;
     echo 'Informations:'.PHP_EOL;
-    echo !str_starts_with($version, '@git_tag') ? '  Version: '.$version.PHP_EOL : '';
+    echo ! str_starts_with($version, '@git_tag') ? '  Version: '.$version.PHP_EOL : '';
     // echo 'PHP sapi name: '.php_sapi_name().PHP_EOL;
     echo '  Based on https://github.com/srwiez/php-svg-ps-converter version: '.getComposerVersion('srwiez/php-svg-ps-converter').PHP_EOL;
     echo '  Built with https://github.com/box-project/box'.PHP_EOL;
diff --git a/tests/Feature/ValidationTest.php b/tests/Feature/ValidationTest.php
index dc121e1..372513e 100644
--- a/tests/Feature/ValidationTest.php
+++ b/tests/Feature/ValidationTest.php
@@ -10,13 +10,13 @@
 test('it output an error if output directory does not exist', function () {
     exec('php src/svgtinyps.php convert assets/twitter.svg tmp/output/does-not-exist.svg', $output, $exitCode);
     $output = implode("\n", $output); // Combine array elements into a single string
-    expect($output)->toContain("Error: The output directory either does not exist or is not writeable")
+    expect($output)->toContain('Error: The output directory either does not exist or is not writeable')
         ->and($exitCode)->toBe(1);
 });
 
 test('it output an error if output directory is not provided', function () {
     exec('php src/svgtinyps.php convert assets/twitter.svg', $output, $exitCode);
     $output = implode("\n", $output); // Combine array elements into a single string
-    expect($output)->toContain("Error: Output file not provided for conversion")
+    expect($output)->toContain('Error: Output file not provided for conversion')
         ->and($exitCode)->toBe(1);
 });