bpo-37124: Fix reference leak in test_msilib (GH-13750)
diff --git a/Lib/test/test_msilib.py b/Lib/test/test_msilib.py
index fa0be58..f9bd0da 100644
--- a/Lib/test/test_msilib.py
+++ b/Lib/test/test_msilib.py
@@ -87,6 +87,7 @@
db, db_path = init_database()
self.addCleanup(unlink, db_path)
self.addCleanup(db.Close)
+ self.addCleanup(msilib._directories.clear)
feature = msilib.Feature(db, 0, 'Feature', 'A feature', 'Python')
cab = msilib.CAB('CAB')
dir = msilib.Directory(db, cab, None, TESTFN, 'TARGETDIR',