diff --git a/test/00/source.py b/test/00/source.py
old mode 100644
new mode 100755
index 4b01e6d..d558bfa
--- a/test/00/source.py
+++ b/test/00/source.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import socket
 import sys
 import array
diff --git a/test/00/target.py b/test/00/target.py
old mode 100644
new mode 100755
index 001b0a2..61a9f7c
--- a/test/00/target.py
+++ b/test/00/target.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import socket
 import sys
 import array