diff --git a/Lib/test/test_statistics.py b/Lib/test/test_statistics.py
--- a/Lib/test/test_statistics.py
+++ b/Lib/test/test_statistics.py
@@ -3,6 +3,7 @@
 
 """
 
+import sys
 import collections
 import decimal
 import doctest
@@ -627,7 +628,8 @@
 class DocTests(unittest.TestCase):
     def test_doc_tests(self):
         failed, tried = doctest.testmod(statistics)
-        self.assertGreater(tried, 0)
+        if sys.flags.optimize < 2:
+            self.assertGreater(tried, 0)
         self.assertEqual(failed, 0)
 
 class StatisticsErrorTest(unittest.TestCase):