diff --git a/noxfile.py b/noxfile.py
index c8c96bfa..c623d312 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -131,7 +131,6 @@ def tests(session: Session) -> None:
         session.install("dataclasses")
 
     try:
-        session.env.pop("TMPDIR", None)
         session.run("coverage", "run", "--parallel", "-m", "pytest", *session.posargs)
     finally:
         if session.interactive: