diff --git a/misc/py-mmsegmentation/files/patch-setup.py b/misc/py-mmsegmentation/files/patch-setup.py
new file mode 100644
index 000000000000..214a39e3cbc1
--- /dev/null
+++ b/misc/py-mmsegmentation/files/patch-setup.py
@@ -0,0 +1,11 @@
+--- setup.py.orig	2026-09-13 00:44:05 UTC
++++ setup.py
+@@ -176,7 +176,7 @@ if __name__ == '__main__':
+         author_email='openmmlab@gmail.com',
+         keywords='computer vision, semantic segmentation',
+         url='https://github.com/open-mmlab/mmsegmentation',
+-        packages=find_packages(exclude=('configs', 'tools', 'demo')),
++        packages=find_packages(exclude=('configs', 'tools', 'demo', 'tests', 'tests.*')),
+         include_package_data=True,
+         classifiers=[
+             'Development Status :: 4 - Beta',