ParentTestClassConstructorRector

PHPUnit\Framework\TestCase requires a parent constructor call

 use PHPUnit\Framework\TestCase;

 final class SomeHelper extends TestCase
 {
+    public function __construct()
+    {
+        parent::__construct(static::class);
+    }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\PHPUnit\PHPUnit100\Rector\Class_\ParentTestClassConstructorRector;

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