diff --git a/tests/kdc/krb5.conf.keys.in b/tests/kdc/krb5.conf.keys.in
index f02ecc74b..1c98d8844 100644
--- a/tests/kdc/krb5.conf.keys.in
+++ b/tests/kdc/krb5.conf.keys.in
@@ -1,5 +1,8 @@
 # $Id$
 
+[libdefaults]
+	allow_weak_crypto = TRUE
+
 [kdc]
 	database = {
 		dbname = @objdir@/current-db