diff --git a/Lib/test/test_optparse.py b/Lib/test/test_optparse.py
index cdbbc9d5491..3601c54a2f3 100644
--- a/Lib/test/test_optparse.py
+++ b/Lib/test/test_optparse.py
@@ -756,6 +756,11 @@ class TestStandard(BaseTest):
                            {'a': "-b3", 'boo': None, 'foo': None},
                            [])
 
+    def test_combined_single_invalid_option(self):
+        self.parser.add_option("-t", action="store_true")
+        self.assertParseFail(["-test"],
+                          "no such option: -e")
+
 class TestBool(BaseTest):
     def setUp(self):
         options = [make_option("-v",