diff --git a/tests/Composer/Test/Package/Loader/ValidatingArrayLoaderTest.php b/tests/Composer/Test/Package/Loader/ValidatingArrayLoaderTest.php
index 24f8b687a..7f39a8789 100644
--- a/tests/Composer/Test/Package/Loader/ValidatingArrayLoaderTest.php
+++ b/tests/Composer/Test/Package/Loader/ValidatingArrayLoaderTest.php
@@ -245,6 +245,7 @@ class ValidatingArrayLoaderTest extends TestCase
      *
      * @param array<string, mixed> $config
      * @param string[]             $expectedWarnings
+     * @param array<string, mixed>|null $expectedArray
      */
     public function testLoadSkipsWarningDataWhenIgnoringErrors(array $config, array $expectedWarnings, bool $mustCheck = true, ?array $expectedArray = null): void
     {