diff --git a/test/other/test_uncrypt.php b/test/other/test_uncrypt.php
index 2607215ef32..664791e095c 100755
--- a/test/other/test_uncrypt.php
+++ b/test/other/test_uncrypt.php
@@ -15,7 +15,10 @@ if (! $res) {
 if (! $res) {
 	@include_once './master.inc.php';
 }
+include_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
 
+print dol_stringtotime('2024-01-01')."\n";
+print dol_stringtotime('2024-01-01 00:00:05');
 
 print "Decode with dol_decode a value crypted with dol_encode:.... in conf.php file\n";