diff --git a/bin/tests/system/upforwd/tests_sh_upforwd.py b/bin/tests/system/upforwd/tests_sh_upforwd.py
index 35bcc64f34..9b2a26364e 100644
--- a/bin/tests/system/upforwd/tests_sh_upforwd.py
+++ b/bin/tests/system/upforwd/tests_sh_upforwd.py
@@ -9,6 +9,11 @@
 # See the COPYRIGHT file distributed with this work for additional
 # information regarding copyright ownership.
 
+import pytest
 
+import isctest.mark
+
+
+@pytest.mark.xfail(reason="GL #4996", condition=isctest.mark.with_dnstap())
 def test_upforwd(run_tests_sh):
     run_tests_sh()