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:

 class Test extends TestCase {
     public function testFoo(): void
     {
-        new MockHelper($this->createMock(I::class));
+        new MockHelper($this->createStub(I::class));
     }
 }

PHP snippet to change

<?php

use PHPUnit\Framework\MockObject\MockObject;
use PHPUnit\Framework\TestCase;

interface I {}

class MockHelper {
    public function __construct(
    	public MockObject&I $i
    ) {}
    
    public function configureMock(array $data): void
    {
        // do some more complex mock configuration based on the given data
    }
}

class Test extends TestCase {
    public function testFoo(): void
    {
        new MockHelper($this->createMock(I::class));
    }
}

Applied Rules:

CreateStubOverCreateMockArgRector

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\PHPUnit120\Rector\CallLike\CreateStubOverCreateMockArgRector::class
    ]);

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