diff --git a/tests/kdc/krb5.conf.in b/tests/kdc/krb5.conf.in
index c7895c56c..eedd5072b 100644
--- a/tests/kdc/krb5.conf.in
+++ b/tests/kdc/krb5.conf.in
@@ -17,6 +17,7 @@
 		kdc = localhost:@port@
 		admin_server = localhost:@admport@
 		kpasswd_server = localhost:@pwport@
+		name_canon_rules = as-is:realm=TEST.H5L.SE
 	}
 	SUB.TEST.H5L.SE = {
 		kdc = localhost:@port@