diff --git a/setup.py b/setup.py
index 83aba4d5..c0e3c347 100755
--- a/setup.py
+++ b/setup.py
@@ -260,6 +260,7 @@ def get_greenlet_version():
         'test': [
             'objgraph',
             'psutil',
+            'setuptools',
         ],
     },
     python_requires=">=3.9",