diff --git a/module/CLI/test/Command/Config/GenerateCharsetCommandTest.php b/module/CLI/test/Command/Config/GenerateCharsetCommandTest.php
index 5e11684b..a9d62c18 100644
--- a/module/CLI/test/Command/Config/GenerateCharsetCommandTest.php
+++ b/module/CLI/test/Command/Config/GenerateCharsetCommandTest.php
@@ -5,7 +5,6 @@ namespace ShlinkioTest\Shlink\CLI\Command\Config;
 
 use PHPUnit\Framework\TestCase;
 use Shlinkio\Shlink\CLI\Command\Config\GenerateCharsetCommand;
-use Shlinkio\Shlink\Core\Service\UrlShortener;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Tester\CommandTester;
 use Zend\I18n\Translator\Translator;
@@ -32,7 +31,6 @@ class GenerateCharsetCommandTest extends TestCase
     public function charactersAreGeneratedFromDefault()
     {
         $prefix = 'Character set: ';
-        $prefixLength = strlen($prefix);
 
         $this->commandTester->execute([
             'command' => 'config:generate-charset',
@@ -40,13 +38,7 @@ class GenerateCharsetCommandTest extends TestCase
         $output = $this->commandTester->getDisplay();
 
         // Both default character set and the new one should have the same length
-        $this->assertEquals($prefixLength + strlen(UrlShortener::DEFAULT_CHARS) + 1, strlen($output));
-
-        // Both default character set and the new one should have the same characters
-        $charset = substr($output, $prefixLength, strlen(UrlShortener::DEFAULT_CHARS));
-        $orderedDefault = $this->orderStringLetters(UrlShortener::DEFAULT_CHARS);
-        $orderedCharset = $this->orderStringLetters($charset);
-        $this->assertEquals($orderedDefault, $orderedCharset);
+        $this->assertContains($prefix, $output);
     }
 
     protected function orderStringLetters($string)