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:

 <?php
 
 use PHPUnit\Framework\TestCase;
 
+#[\PHPUnit\Framework\Attributes\AllowMockObjectsWithoutExpectations]
 final class FooTest extends TestCase
 {
     private ClassToStub $foo;

PHP snippet to change

<?php

use PHPUnit\Framework\TestCase;

final class FooTest extends TestCase
{
    private ClassToStub $foo;

    public function setUp(): void
    {
        parent::setUp();

        $foo = self::createStub(\ClassToStub::class);
        $foo->method('foo')->willReturn('error');

        $this->foo = $foo;
    }

    public function test()
    {
       $this->foo->foo();
    }
}

class ClassToStub
{
    public function foo(): string
    {
        return 'error';
    }
};

Applied Rules:

AllowMockObjectsWithoutExpectationsAttributeRector

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;
use Rector\PHPUnit\PHPUnit120\Rector\Class_\AllowMockObjectsWithoutExpectationsAttributeRector;

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

Rector version: 2.4.2 - released at 2026-04-16 14:00