Issue #14599: Fix an import caching race condition.

brettcannon · brettcannon · commit 4132368d0aea · 2012-04-16T20:50:33.000-04:00
diff --git a/Lib/test/test_import.py b/Lib/test/test_import.py
@@ -346,6 +346,7 @@ def test_extension_import_fail(self):
         pkg_name = "extension"
         pkg_file = pkg_name + "{}".format("_d.pyd" if debug else ".pyd")
         with open(pkg_file, "w"): pass
+        importlib.invalidate_caches()
         try:
             with self.assertRaises(ImportError) as err:
                 import extension
