diff --git a/Lib/test/test_optparse.py b/Lib/test/test_optparse.py
index 28b274462..c68214961 100644
--- a/Lib/test/test_optparse.py
+++ b/Lib/test/test_optparse.py
@@ -15,7 +15,7 @@ import unittest
 from io import StringIO
 from test import support
 from test.support import os_helper
-
+from test.support.i18n_helper import TestTranslationsBase, update_translation_snapshots
 
 import optparse
 from optparse import make_option, Option, \
@@ -614,9 +614,9 @@ Options:
         self.parser.add_option(
             "-p", "--prob",
             help="blow up with probability PROB [default: %default]")
-        self.parser.set_defaults(prob=0.43)
+        self.parser.set_defaults(prob=0.25)
         expected_help = self.help_prefix + \
-            "  -p PROB, --prob=PROB  blow up with probability PROB [default: 0.43]\n"
+            "  -p PROB, --prob=PROB  blow up with probability PROB [default: 0.25]\n"
         self.assertHelp(self.parser, expected_help)
 
     def test_alt_expand(self):
@@ -1656,5 +1656,14 @@ class MiscTestCase(unittest.TestCase):
         support.check__all__(self, optparse, not_exported=not_exported)
 
 
+class TestTranslations(TestTranslationsBase):
+    def test_translations(self):
+        self.assertMsgidsEqual(optparse)
+
+
 if __name__ == '__main__':
+    # To regenerate translation snapshots
+    if len(sys.argv) > 1 and sys.argv[1] == '--snapshot-update':
+        update_translation_snapshots(optparse)
+        sys.exit(0)
     unittest.main()