diff --git a/tests/Factory/AppFactoryTest.php b/tests/Factory/AppFactoryTest.php
index 42565e89f..0d467c14e 100644
--- a/tests/Factory/AppFactoryTest.php
+++ b/tests/Factory/AppFactoryTest.php
@@ -113,6 +113,7 @@ public function testDetermineResponseFactoryThrowsRuntimeExceptionIfDecoratedNot
     /**
      * @runInSeparateProcess - Psr17FactoryProvider::setFactories breaks other tests
      */
+    #[\PHPUnit\Framework\Attributes\RunInSeparateProcess]
     public function testDetermineResponseFactoryThrowsRuntimeException()
     {
         $this->expectException(RuntimeException::class);