diff --git a/test/phpunit/ModulesTest.php b/test/phpunit/ModulesTest.php
index 9e71bc15102..9bbfa47eed8 100644
--- a/test/phpunit/ModulesTest.php
+++ b/test/phpunit/ModulesTest.php
@@ -152,9 +152,11 @@ class ModulesTest extends PHPUnit\Framework\TestCase
 			require_once DOL_DOCUMENT_ROOT.'/core/modules/mod'.$modlabel.'.class.php';
 			$class='mod'.$modlabel;
 			$mod=new $class($db);
+
 			$result=$mod->remove();
 			$result=$mod->init();
-			$this->assertLessThan($result, 0, $modlabel);
+
+			$this->assertLessThan($result, 0, $modlabel." ".$mod->error);
 			print __METHOD__." test remove/init for module ".$modlabel.", result=".$result."\n";
 
 			if (in_array($modlabel, array('Ldap', 'MailmanSpip'))) {