diff --git a/regtests/0252_spws/test.py b/regtests/0252_spws/test.py
index 0e1b989..9f40edc 100644
--- a/regtests/0252_spws/test.py
+++ b/regtests/0252_spws/test.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 #                              Ada Web Server
 #
 #                     Copyright (C) 2014-2015, AdaCore
diff --git a/regtests/gen_system_tags.py b/regtests/gen_system_tags.py
index 58782af..42cf161 100755
--- a/regtests/gen_system_tags.py
+++ b/regtests/gen_system_tags.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 """
 ./gen_system_tags.py /path/to/aws/makefile.setup
 
diff --git a/regtests/run-test b/regtests/run-test
index a9b207c..912e730 100644
--- a/regtests/run-test
+++ b/regtests/run-test
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 """Usage: run-test [options] test_dir
 
 Run a single test located in test_dir
diff --git a/regtests/testsuite.py b/regtests/testsuite.py
index 37b615d..d747d8d 100755
--- a/regtests/testsuite.py
+++ b/regtests/testsuite.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 #                              Ada Web Server
 #
 #                     Copyright (C) 2003-2015, AdaCore
diff --git a/tools/awsascb b/tools/awsascb
index f3b5023..e9dedad 100755
--- a/tools/awsascb
+++ b/tools/awsascb
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python2
 
 import sys