diff --git a/tests/isisd/test_fuzz_isis_tlv.py b/tests/isisd/test_fuzz_isis_tlv.py
index bf700bfee2..d96e3c4fee 100644
--- a/tests/isisd/test_fuzz_isis_tlv.py
+++ b/tests/isisd/test_fuzz_isis_tlv.py
@@ -2,10 +2,21 @@ import frrtest
 
 import pytest
 import platform
+import socket
 
-if platform.uname()[0] == 'SunOS':
+
+##
+# on musl, ntop compresses a single :0: -> :: which is against RFC
+##
+def inet_ntop_broken():
+    addr = '1:2:3:4:0:6:7:8'
+    return socket.inet_ntop(socket.AF_INET6,
+                            socket.inet_pton(socket.AF_INET6, addr)) != addr
+
+
+if platform.uname()[0] == 'SunOS' or inet_ntop_broken():
     class TestFuzzIsisTLV:
-        @pytest.mark.skipif(True, reason='Test unsupported on SunOS')
+        @pytest.mark.skipif(True, reason='Test unsupported')
         def test_exit_cleanly(self):
             pass
 else: