SingleMockPropertyTypeRector

Make properties in tests with intersection mock object either object type or mock type

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

 final class MockingEntity extends TestCase
 {
-    private SimpleObject|MockObject $someEntityMock;
+    private MockObject $someEntityMock;

     protected function setUp(): void
     {
         $this->someEntityMock = $this->createMock(SimpleObject::class);
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\PHPUnit\CodeQuality\Rector\Class_\SingleMockPropertyTypeRector;

return RectorConfig::configure()
    ->withRules([
        SingleMockPropertyTypeRector::class,
    ]);
SETS:  Code Quality