diff --git a/ext/auto-inst/test_parsing.py b/ext/auto-inst/test_parsing.py
index dde64d41fe..706b48f0cd 100755
--- a/ext/auto-inst/test_parsing.py
+++ b/ext/auto-inst/test_parsing.py
@@ -122,6 +122,7 @@ def test_instruction_encoding(self, instr_name):
             or instr_name == "c.nop"
             or instr_name == "fcvtmod.w.d"
             or instr_name == "fence"
+            or instr_name == "fence.tso"
         ):
             pytest.skip(
                 f"Instruction {instr_name} is a corner case and implementation should not follow ISA spec"