Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

+declare(strict_types=1);
+
 declare(strict_types=1);
 
  <?php

  */
 abstract class Example extends TestCase
 {
}

PHP snippet to change

declare(strict_types=1);

 <?php

use PHPUnit\Framework\TestCase;

/**
 * Example class.
 */
abstract class Example extends TestCase
{
}

Applied Rules:

DeclareStrictTypesTestsRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\PHPUnit\CodeQuality\Rector\StmtsAwareInterface\DeclareStrictTypesTestsRector;

return RectorConfig::configure()
    ->withRules([
        DeclareStrictTypesTestsRector::class,
    ]);

Rector version: b12180 - released at 2026-01-03 18:52