CreateStubInCoalesceArgRector

Use createStub() over createMock() when used as argument/array item coalesce ?? fallback

 use PHPUnit\Framework\TestCase;

 final class SomeTest extends TestCase
 {
     public function test()
     {
         $mockObject = $this->>get('service');
-        $this->someMethod($mockObject ?? $this->createMock(SomeClass::class));
+        $this->someMethod($mockObject ?? $this->createStub(SomeClass::class));
     }

     private function someMethod($someClass)
     {
-    }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\PHPUnit\PHPUnit120\Rector\CallLike\CreateStubInCoalesceArgRector;

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