bpo-40275: Use new test.support helper submodules in tests (GH-21449)

diff --git a/Lib/test/test_curses.py b/Lib/test/test_curses.py
index 5e619d1..2c6d14c 100644
--- a/Lib/test/test_curses.py
+++ b/Lib/test/test_curses.py
@@ -15,7 +15,8 @@
 import tempfile
 import unittest
 
-from test.support import requires, import_module, verbose, SaveSignals
+from test.support import requires, verbose, SaveSignals
+from test.support.import_helper import import_module
 
 # Optionally test curses module.  This currently requires that the
 # 'curses' resource be given on the regrtest command line using the -u