For diagnosis, try to list the directory first

diff --git a/Lib/test/test_import.py b/Lib/test/test_import.py
index a38273c50a8194ae276c01467ced1d44023972e1..61fea789341a2dabbb4d6bc6d743fdbbbe386203 100644 (file)
--- a/Lib/test/test_import.py
+++ b/Lib/test/test_import.py
@@ -466,6 +466,7 @@ class PathsTests(unittest.TestCase):
         unc += path[2:]
         sys.path.insert(0, unc)
         try:
+            os.listdir(unc)
             try:
                 mod = __import__("test_unc_path")
             except ImportError as e: