diff --git a/wintest/test-s3.py b/wintest/test-s3.py
index 0c270ea8f9a..1c5142bea56 100755
--- a/wintest/test-s3.py
+++ b/wintest/test-s3.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 '''automated testing of Samba3 against windows'''
 
diff --git a/wintest/test-s4-howto.py b/wintest/test-s4-howto.py
index ac550b2e4d0..5102387124a 100755
--- a/wintest/test-s4-howto.py
+++ b/wintest/test-s4-howto.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 '''automated testing of the steps of the Samba4 HOWTO'''
 
diff --git a/wintest/wintest.py b/wintest/wintest.py
index 4152069bbdf..c239bab5506 100644
--- a/wintest/wintest.py
+++ b/wintest/wintest.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 '''automated testing library for testing Samba against windows'''