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     {
         $function = fn (): string => 'something';
         
-        self::assertSame(1, preg_match('/^.+__o__[0-9A-Fa-f]+__s\d+$/', $function()));
+        self::assertRegExp('/^.+__o__[0-9A-Fa-f]+__s\d+$/', $function());
     }
 }

PHP snippet to change

<?php

declare(strict_types=1);

namespace App\Tests\Integration\Video\Recreation;

use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;

final class EpisodeRecreatorTest extends TestCase
{
    #[Test]
    public function recreate(): void
    {
        $function = fn (): string => 'something';
        
        self::assertSame(1, preg_match('/^.+__o__[0-9A-Fa-f]+__s\d+$/', $function()));
    }
}

Applied Rules:

AssertRegExpRector

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\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;
use Rector\ValueObject\PhpVersion;

return RectorConfig::configure()
    ->withRules([
        \Rector\PHPUnit\CodeQuality\Rector\MethodCall\AssertRegExpRector::class
    ])
    // demonstrate specific PHP version
    ->withPhpVersion(PhpVersion::PHP_81);

Rector version: 68156b - released at 2026-03-29 00:56