Index: Lib/lib2to3/tests/test_fixers.py
===================================================================
--- Lib/lib2to3/tests/test_fixers.py	(revision 81679)
+++ Lib/lib2to3/tests/test_fixers.py	(working copy)
@@ -3675,6 +3675,9 @@
         s = "from itertools import foo"
         self.unchanged(s)
 
+    def test_star(self):
+        s = "from itertools import *"
+        self.warns_unchanged(s, "Cannot handle star imports")
 
 class Test_import(FixerTestCase):
     fixer = "import"