Fix possible "file already exists" error when running the tests in parallel.
This is a perfect example of LBYL going wrong: that code could be executed
by several workers in parallel, and os.mkdir() attempted on the same
path by multiple processes.
diff --git a/Misc/NEWS b/Misc/NEWS
index 01b5119..f5f08e4 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -269,6 +269,8 @@
Tests
-----
+- Fix possible "file already exists" error when running the tests in parallel.
+
- Issue #11719: Fix message about unexpected test_msilib skip on non-Windows
platforms. Patch by Nadeem Vawda.