The checks were disabled for version 2.0.8 because of an issues with byteArrayToString. [junit] Testcase: test_rdataToString took 0,002 sec [junit] Testcase: test_toString took 0,006 sec [junit] Testcase: test_byteArrayFromString took 0,001 sec [junit] Testcase: test_byteArrayFromString_invalid took 0,003 sec [junit] Testcase: test_byteArrayToString took 0,009 sec [junit] FAILED [junit] expected:<" \031Aa[\];\"\\~\127\255"> but was:<" \031Aa[];\"\\~\127\255"> [junit] junit.framework.ComparisonFailure: expected:<" \031Aa[\];\"\\~\127\255"> but was:<" \031Aa[];\"\\~\127\255"> [junit] at org.xbill.DNS.RecordTest.test_byteArrayToString(RecordTest.java:553) [junit] The problem was reported to upstream, it is unclear for the moment if the bug if with the testing or with the main code.