diff --git a/tests/Composer/AutoloadDumperTest.php b/tests/Composer/AutoloadDumperTest.php
index 4fcd5c13..26886321 100644
--- a/tests/Composer/AutoloadDumperTest.php
+++ b/tests/Composer/AutoloadDumperTest.php
@@ -261,7 +261,7 @@ public static function autoloadProvider(): iterable
 
                 \$loader = (static function () {
                     // Backup the autoloaded Composer files
-                    \$existingComposerAutoloadFiles = \isset($GLOBALS['__composer_autoload_files']) ? $GLOBALS['__composer_autoload_files'] : [];
+                    \$existingComposerAutoloadFiles = \isset(\$GLOBALS['__composer_autoload_files']) ? \$GLOBALS['__composer_autoload_files'] : [];
 
                     // @generated by Humbug Box