diff --git a/probe/endpoint/procspy/proc_internal_test.go b/probe/endpoint/procspy/proc_internal_test.go
index 3de48cdc6..1035e485a 100644
--- a/probe/endpoint/procspy/proc_internal_test.go
+++ b/probe/endpoint/procspy/proc_internal_test.go
@@ -40,6 +40,9 @@ var mockFS = fs.Dir("",
    0: 00000000:A6C0 00000000:0000 01 00000000:00000000 00:00000000 00000000   105        0 5107 1 ffff8800a6aaf040 100 0 0 10 2d
 `,
 				},
+				fs.File{
+					FName: "tcp6",
+				},
 			),
 			fs.File{
 				FName:     "stat",