diff --git a/Lib/encodings/rot_13.py b/Lib/encodings/rot_13.py
index 5627bfbc69cbbc8..334624f91ff2d09 100755
--- a/Lib/encodings/rot_13.py
+++ b/Lib/encodings/rot_13.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """ Python Character Mapping Codec for ROT13.
 
 This codec de/encodes from str to str.
diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index a58b922ce30b836..3d68f40263e6084 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """
 This script is used to build "official" universal installers on macOS.
 
diff --git a/Modules/_sha3/cleanup.py b/Modules/_sha3/cleanup.py
index 4f53681b49e67bc..1d81b83c027a02a 100755
--- a/Modules/_sha3/cleanup.py
+++ b/Modules/_sha3/cleanup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright (C) 2012   Christian Heimes (christian@python.org)
 # Licensed to PSF under a Contributor Agreement.
 #
diff --git a/Objects/typeslots.py b/Objects/typeslots.py
index 9b6d4adbc7533b5..2b26dca965a01aa 100755
--- a/Objects/typeslots.py
+++ b/Objects/typeslots.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 # Usage: typeslots.py < Include/typeslots.h typeslots.inc
 
 import sys, re
diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 6fe44b99f793bb4..7f1f51b1a452ed7 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 """Generate C code from an ASDL description."""
 
 import os
diff --git a/Python/makeopcodetargets.py b/Python/makeopcodetargets.py
index 023c9e6c9f1adc1..632c758e1b2ae58 100755
--- a/Python/makeopcodetargets.py
+++ b/Python/makeopcodetargets.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 """Generate C code for the jump table of the threaded code interpreter
 (for compilers supporting computed gotos or "labels-as-values", such as gcc).
 """
diff --git a/Tools/gdb/libpython.py b/Tools/gdb/libpython.py
index 33bf5ac821fffc2..f3814d517b3d20f 100755
--- a/Tools/gdb/libpython.py
+++ b/Tools/gdb/libpython.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 '''
 From gdb 7 onwards, gdb's build can be configured --with-python, allowing gdb
 to be extended with Python code e.g. for library-specific data visualizations,
diff --git a/Tools/pynche/pynche b/Tools/pynche/pynche
index 64bf70335db2f5b..19bf2980806381d 100755
--- a/Tools/pynche/pynche
+++ b/Tools/pynche/pynche
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 """Run this file under Unix, or when debugging under Windows.
 Run the file pynche.pyw under Windows to inhibit the console window.
diff --git a/Tools/scripts/smelly.py b/Tools/scripts/smelly.py
index 43d091654d2dc84..6a17ed979202e46 100755
--- a/Tools/scripts/smelly.py
+++ b/Tools/scripts/smelly.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Script checking that all symbols exported by libpython start with Py or _Py
 
 import subprocess