diff --git a/package_manager/tests/src/Kernel/RsyncValidatorTest.php b/package_manager/tests/src/Kernel/RsyncValidatorTest.php
index e244c046e17db37f92b3a526ab8f7d596b122c30..533679a9318ae4275bb81cf0d7a7bc541bf3d3c9 100644
--- a/package_manager/tests/src/Kernel/RsyncValidatorTest.php
+++ b/package_manager/tests/src/Kernel/RsyncValidatorTest.php
@@ -25,7 +25,7 @@ class RsyncValidatorTest extends PackageManagerKernelTestBase {
    *
    * @var \PhpTuf\ComposerStager\API\Finder\Service\ExecutableFinderInterface
    */
-  private ObjectProphecy|ExecutableFinderInterface $executableFinder;
+  private ObjectProphecy&ExecutableFinderInterface $executableFinder;
 
   /**
    * {@inheritdoc}