diff --git a/tests/topotests/isis_srv6_topo1/test_isis_srv6_topo1.py b/tests/topotests/isis_srv6_topo1/test_isis_srv6_topo1.py
index 9c1a23f54f..035c60c9a3 100644
--- a/tests/topotests/isis_srv6_topo1/test_isis_srv6_topo1.py
+++ b/tests/topotests/isis_srv6_topo1/test_isis_srv6_topo1.py
@@ -245,7 +245,7 @@ def check_ping6(name, dest_addr, expect_connected):
         if match not in output:
             return "ping fail"
 
-    match = "{} packet loss".format("0%" if expect_connected else "100%")
+    match = "{} packet loss".format(", 0%" if expect_connected else ", 100%")
     logger.info("[+] check {} {} {}".format(name, dest_addr, match))
     tgen = get_topogen()
     func = functools.partial(_check, name, dest_addr, match)