diff --git a/src/_pytest/tmpdir.py b/src/_pytest/tmpdir.py
index 71bf225cd..c0367d796 100644
--- a/src/_pytest/tmpdir.py
+++ b/src/_pytest/tmpdir.py
@@ -308,7 +308,7 @@ def pytest_sessionfinish(session, exitstatus: Union[int, ExitCode]):
         if basetemp.exists():
             # We do a "best effort" to remove files, but it might not be possible due to some leaked resource,
             # permissions, etc, in which case we ignore it.
-            rmtree(passed_dir, ignore_errors=True)
+            rmtree(basetemp, ignore_errors=True)
             return
 
     # Remove dead symlinks.