--- ./setup.py.orig
+++ ./setup.py
@@ -881,7 +881,7 @@
         ext_modules=[Extension("PIL._imaging", ["_imaging.c"])],
         include_package_data=True,
         setup_requires=pytest_runner,
-        tests_require=["pytest"],
+        tests_require=["pytest < 5"],
         packages=["PIL"],
         package_dir={"": "src"},
         keywords=["Imaging"],