diff --git a/checks/check_fli_oob.py b/checks/check_fli_oob.py
old mode 100644
new mode 100755
index e0057a2c2..ac46ff1eb
--- a/checks/check_fli_oob.py
+++ b/checks/check_fli_oob.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 from PIL import Image
diff --git a/checks/check_fli_overflow.py b/checks/check_fli_overflow.py
old mode 100644
new mode 100755
index 5c89efc76..50137c4cc
--- a/checks/check_fli_overflow.py
+++ b/checks/check_fli_overflow.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 from PIL import Image
diff --git a/checks/check_icns_dos.py b/checks/check_icns_dos.py
old mode 100644
new mode 100755
index ac6be4869..c4d41ca7d
--- a/checks/check_icns_dos.py
+++ b/checks/check_icns_dos.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Tests potential DOS of IcnsImagePlugin with 0 length block.
 # Run from anywhere that PIL is importable.
 from __future__ import annotations
diff --git a/checks/check_j2k_dos.py b/checks/check_j2k_dos.py
old mode 100644
new mode 100755
index 2c63c3402..756df21a6
--- a/checks/check_j2k_dos.py
+++ b/checks/check_j2k_dos.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Tests potential DOS of Jpeg2kImagePlugin with 0 length block.
 # Run from anywhere that PIL is importable.
 from __future__ import annotations
diff --git a/checks/check_j2k_leaks.py b/checks/check_j2k_leaks.py
old mode 100644
new mode 100755
index 7103d502e..7170334c3
--- a/checks/check_j2k_leaks.py
+++ b/checks/check_j2k_leaks.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import sys
diff --git a/checks/check_j2k_overflow.py b/checks/check_j2k_overflow.py
old mode 100644
new mode 100755
index 58566c4b2..eb333e1f6
--- a/checks/check_j2k_overflow.py
+++ b/checks/check_j2k_overflow.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 from pathlib import Path
diff --git a/checks/check_jp2_overflow.py b/checks/check_jp2_overflow.py
old mode 100644
new mode 100755
index 954d68bf7..894ec5f74
--- a/checks/check_jp2_overflow.py
+++ b/checks/check_jp2_overflow.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Reproductions/tests for OOB read errors in FliDecode.c
 
 # When run in python, all of these images should fail for
diff --git a/checks/check_jpeg_leaks.py b/checks/check_jpeg_leaks.py
old mode 100644
new mode 100755
index 2c27ce1d5..da180ae2c
--- a/checks/check_jpeg_leaks.py
+++ b/checks/check_jpeg_leaks.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import sys
diff --git a/checks/check_large_memory.py b/checks/check_large_memory.py
old mode 100644
new mode 100755
index c9feda3b1..59870c51f
--- a/checks/check_large_memory.py
+++ b/checks/check_large_memory.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import sys
diff --git a/checks/check_large_memory_numpy.py b/checks/check_large_memory_numpy.py
old mode 100644
new mode 100755
index 458b0ab72..befe11875
--- a/checks/check_large_memory_numpy.py
+++ b/checks/check_large_memory_numpy.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import sys
diff --git a/checks/check_libtiff_segfault.py b/checks/check_libtiff_segfault.py
old mode 100644
new mode 100755
index 84bda53ed..d1cb33fab
--- a/checks/check_libtiff_segfault.py
+++ b/checks/check_libtiff_segfault.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import pytest
diff --git a/checks/check_png_dos.py b/checks/check_png_dos.py
old mode 100644
new mode 100755
index 1bfb94ab7..3da251a7a
--- a/checks/check_png_dos.py
+++ b/checks/check_png_dos.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import zlib
diff --git a/checks/check_release_notes.py b/checks/check_release_notes.py
old mode 100644
new mode 100755
index cf414d7ff..e92c9bc6a
--- a/checks/check_release_notes.py
+++ b/checks/check_release_notes.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import sys
diff --git a/checks/check_wheel.py b/checks/check_wheel.py
old mode 100644
new mode 100755
index f716c8498..d225e0ec9
--- a/checks/check_wheel.py
+++ b/checks/check_wheel.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import annotations
 
 import platform