[3.11] gh-108927: Fix test_import + test_importlib + test_unittest pr…

…oblem (GH-108929) (#110347)

gh-108927: Fix test_import + test_importlib + test_unittest problem (GH-108929)
(cherry picked from commit 3f89b25)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

Lib/unittest/test/test_discovery.py

@@ -6,7 +6,6 @@
 import pickle
 from test import support
 from test.support import import_helper
-import test.test_importlib.util
 
 import unittest
 import unittest.mock
@@ -826,6 +825,8 @@ def restore():
                          'as dotted module names')
 
     def test_discovery_failed_discovery(self):
+        from test.test_importlib import util
+
         loader = unittest.TestLoader()
         package = types.ModuleType('package')
 
@@ -837,7 +838,7 @@ def _import(packagename, *args, **kwargs):
             # Since loader.discover() can modify sys.path, restore it when done.
             with import_helper.DirsOnSysPath():
                 # Make sure to remove 'package' from sys.modules when done.
-                with test.test_importlib.util.uncache('package'):
+                with util.uncache('package'):
                     with self.assertRaises(TypeError) as cm:
                         loader.discover('package')
                     self.assertEqual(str(cm.exception),