diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index a66e04e2..6dd23778 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -31,5 +31,10 @@
 }
 
 if (file_exists($file = __DIR__.'/custom_bootstrap.php')) {
+    /**
+     * @psalm-suppress MissingFile,UnusedPsalmSuppress
+     *
+     * @see https://github.com/vimeo/psalm/issues/3886
+     */
     require_once $file;
 }