diff --git a/tests/common/portstat_utilities.py b/tests/common/portstat_utilities.py
index df33b5a74bc..2b867c84b4d 100644
--- a/tests/common/portstat_utilities.py
+++ b/tests/common/portstat_utilities.py
@@ -74,6 +74,10 @@ def parse_portstat(content_lines):
             portstats.append(portstat)
 
         intf = portstats[0]
+        # skip lines that are not port stat.
+        if not intf.strip().startswith( 'Ethernet' ):
+            continue
+
         results[intf] = {}
         for idx in range(1, len(portstats)):    # Skip the first column interface name
             results[intf][headers[idx]] = portstats[idx]