diff --git a/tests/src/Unit/YamlRecursiveDirectoryDiscoveryTest.php b/tests/src/Unit/YamlRecursiveDirectoryDiscoveryTest.php
index 14a0450f763663e08aa3025bc8ca7d0220be460f..8020abdd3527262c18e51c69a9cf8530ff99f1e7 100644
--- a/tests/src/Unit/YamlRecursiveDirectoryDiscoveryTest.php
+++ b/tests/src/Unit/YamlRecursiveDirectoryDiscoveryTest.php
@@ -20,6 +20,7 @@ class YamlRecursiveDirectoryDiscoveryTest extends TestCase {
    * {@inheritdoc}
    */
   protected function setUp(): void {
+    parent::setUp();
     // Ensure that FileCacheFactory has a prefix.
     FileCacheFactory::setPrefix('prefix');
   }