--- a/setup.py	2021-03-27 18:54:07.104800689 +0100
+++ b/setup.py	2021-03-27 18:54:23.197091635 +0100
@@ -77,7 +77,6 @@
     include_package_data=True,
     python_requires=">=3.6",  # temporary, for RTD
     keywords=["async", "io", "trio", "asyncio", "trio-asyncio"],
-    setup_requires=['pytest-runner'],
     tests_require=['pytest >= 5.4', 'pytest-trio >= 0.6', 'outcome'],
     classifiers=[
         "Development Status :: 4 - Beta",
