bpo-40275: Use new test.support helper submodules in tests (GH-21743)

diff --git a/Lib/test/test_statistics.py b/Lib/test/test_statistics.py
index bf415dd..9971107 100644
--- a/Lib/test/test_statistics.py
+++ b/Lib/test/test_statistics.py
@@ -15,10 +15,10 @@
 import sys
 import unittest
 from test import support
+from test.support import import_helper
 
 from decimal import Decimal
 from fractions import Fraction
-from test import support
 
 
 # Module to be tested.
@@ -179,8 +179,10 @@
 # We prefer this for testing numeric values that may not be exactly equal,
 # and avoid using TestCase.assertAlmostEqual, because it sucks :-)
 
-py_statistics = support.import_fresh_module('statistics', blocked=['_statistics'])
-c_statistics = support.import_fresh_module('statistics', fresh=['_statistics'])
+py_statistics = import_helper.import_fresh_module('statistics',
+                                                  blocked=['_statistics'])
+c_statistics = import_helper.import_fresh_module('statistics',
+                                                 fresh=['_statistics'])
 
 
 class TestModules(unittest.TestCase):