Fix

Author: sebastianbergmann

tests/_files/mock-object/Issue6174.php

@@ -0,0 +1,17 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\TestFixture\MockObject;
+
+interface Issue6174
+{
+    public function methodNullDefault(?string $param, ?string $nullDefault = null): string;
+
+    public function methodStringDefault(?string $param, ?string $stringDefault = 'something'): string;
+}

tests/_files/mock-object/YetAnotherInterface.php

@@ -9,9 +9,7 @@
  */
 namespace PHPUnit\TestFixture\MockObject;
 
-interface Issue6174
+interface YetAnotherInterface
 {
-    public function methodNullDefault(?string $param, ?string $nullDefault = null): string;
-
-    public function methodStringDefault(?string $param, ?string $stringDefault = 'something'): string;
+    public function doSomethingElseEntirely();
 }