diff --git a/os_testr/generate_subunit.py b/os_testr/generate_subunit.py
index 15b819f..19ff2c5 100755
--- a/os_testr/generate_subunit.py
+++ b/os_testr/generate_subunit.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 # Copyright 2015 Hewlett-Packard Development Company, L.P.
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
diff --git a/os_testr/ostestr.py b/os_testr/ostestr.py
index 88621aa..7e8d5ce 100755
--- a/os_testr/ostestr.py
+++ b/os_testr/ostestr.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 # Copyright 2015 Hewlett-Packard Development Company, L.P.
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
diff --git a/os_testr/subunit_trace.py b/os_testr/subunit_trace.py
index 25beea7..418842d 100755
--- a/os_testr/subunit_trace.py
+++ b/os_testr/subunit_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2014 Hewlett-Packard Development Company, L.P.
 # Copyright 2014 Samsung Electronics