Tests fails on systems with includedir in /etc/krb5.conf

kerby finds /etc/krb5.conf files of other kerberos components, unless the environment variable KRB5_CONF is set to the krb5.conf file of the kerby project. See stacktrace below: the parsing seems to crash on the includedir part of my system's /etc/krb5.conf

java.lang.RuntimeException: Unable to parse:includedir /var/lib/sss/pubconf/krb5.include.d/
at org.apache.kerby.kerberos.kerb.common.Krb5Parser.load(Krb5Parser.java:72)
at org.apache.kerby.kerberos.kerb.common.Krb5Conf.addKrb5Config(Krb5Conf.java:47)
at org.apache.kerby.kerberos.kerb.client.ClientUtil.getDefaultConfig(ClientUtil.java:94)
at org.apache.kerby.kerberos.kerb.client.KrbClientBase.<init>(KrbClientBase.java:51)
at org.apache.kerby.kerberos.kerb.client.KrbClient.<init>(KrbClient.java:38)
at org.apache.kerby.kerberos.kerb.server.SimpleKdcServer.<init>(SimpleKdcServer.java:54)
at org.myorg.MyTest.startSimpleKdcServer(MyTest.java:79)