diff --git a/tests/check_build_files/main.go b/tests/check_build_files/main.go
index 8ab972d..7f2f5a5 100644
--- a/tests/check_build_files/main.go
+++ b/tests/check_build_files/main.go
@@ -63,7 +63,7 @@
 		}
 
 		switch rel {
-		case ".git", "cache", "build", "out":
+		case ".git", "cache", "build", "out", "third_party":
 			return filepath.SkipDir
 		}