diff --git a/Lib/test/test_pkgutil.py b/Lib/test/test_pkgutil.py
index a14f091..b3fc5d8 100644
--- a/Lib/test/test_pkgutil.py
+++ b/Lib/test/test_pkgutil.py
@@ -122,6 +122,9 @@
 
 def test_main():
     run_unittest(PkgutilTests, PkgutilPEP302Tests)
+    # this is necessary if test is run repeated (like when finding leaks)
+    import zipimport
+    zipimport._zip_directory_cache.clear()
 
 if __name__ == '__main__':
     test_main()