diff --git a/lemonldap-ng-manager/t/test-lib.pm b/lemonldap-ng-manager/t/test-lib.pm
index b8b549767..c0b80df2b 100644
--- a/lemonldap-ng-manager/t/test-lib.pm
+++ b/lemonldap-ng-manager/t/test-lib.pm
@@ -1,6 +1,7 @@
 # Base library for tests
 
 use strict;
+use Data::Dumper;
 use 5.10.0;
 use_ok('Lemonldap::NG::Manager::Cli::Lib');