diff --git a/selftest/knownfail b/selftest/knownfail
index baf3d57a31a..93c1a3511ac 100644
--- a/selftest/knownfail
+++ b/selftest/knownfail
@@ -327,6 +327,9 @@
 ^samba.tests.dcerpc.dnsserver.samba.tests.dcerpc.dnsserver.DnsserverTests.test_add_duplicate_different_type.*
 ^samba.tests.dcerpc.dnsserver.samba.tests.dcerpc.dnsserver.DnsserverTests.test_rank_none.*
 ^samba.tests.dcerpc.dnsserver.samba.tests.dcerpc.dnsserver.DnsserverTests.test_security_descriptor.*
+^samba.tests.dcerpc.dnsserver.python3.samba.tests.dcerpc.dnsserver.DnsserverTests.test_add_duplicate_different_type.*
+^samba.tests.dcerpc.dnsserver.python3.samba.tests.dcerpc.dnsserver.DnsserverTests.test_rank_none.*
+^samba.tests.dcerpc.dnsserver.python3.samba.tests.dcerpc.dnsserver.DnsserverTests.test_security_descriptor.*
 ^samba3.smb2.credits.session_setup_credits_granted.*
 ^samba3.smb2.credits.single_req_credits_granted.*
 ^samba3.smb2.credits.skipped_mid.*