diff --git a/noxfile.py b/noxfile.py
index e5b92961..d9ae6f35 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -36,7 +36,6 @@ def tests(session):
     _install_dev_packages(session)
     _install_test_dependencies(session)
 
-    session.install("pytest")
     session.run("pytest")
 
     session.notify("cover")