diff --git a/test/phpunit/DateLibTest.php b/test/phpunit/DateLibTest.php
index 5b2dba2dd22..eb3fa40f98d 100644
--- a/test/phpunit/DateLibTest.php
+++ b/test/phpunit/DateLibTest.php
@@ -301,7 +301,21 @@ class DateLibTest extends PHPUnit_Framework_TestCase
         $langs=$this->savlangs;
         $db=$this->savdb;
 
-        $stime='1970-01-01T02:00:00Z';
+		$conf->global->MAIN_OLD_DATE=1;
+
+		$stime='19700102';
+		$result=dol_stringtotime($stime);
+		print __METHOD__." result=".$result."\n";
+		$this->assertEquals(86400,$result);
+
+		$conf->global->MAIN_OLD_DATE=0;
+
+		$stime='19700102';
+		$result=dol_stringtotime($stime);
+		print __METHOD__." result=".$result."\n";
+		$this->assertEquals(86400,$result);
+
+		$stime='1970-01-01T02:00:00Z';
         $result=dol_stringtotime($stime);
     	print __METHOD__." result=".$result."\n";
 		$this->assertEquals(7200,$result);
@@ -310,7 +324,7 @@ class DateLibTest extends PHPUnit_Framework_TestCase
         $result=dol_stringtotime($stime);
     	print __METHOD__." result=".$result."\n";
 		$this->assertEquals(7200,$result);
-		
+
         $stime='19700101T020000Z';
         $result=dol_stringtotime($stime);
     	print __METHOD__." result=".$result."\n";
@@ -321,11 +335,6 @@ class DateLibTest extends PHPUnit_Framework_TestCase
 		print __METHOD__." result=".$result."\n";
 		$this->assertEquals(7200,$result);
 
-		$stime='19700101';
-		$result=dol_stringtotime($stime);
-		print __METHOD__." result=".$result."\n";
-		$this->assertEquals(0,$result);
-
         return $result;
     }