1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/test_iter.py b/Lib/test/test_iter.py
index a91670b4a1..542b28419e 100644
--- a/Lib/test/test_iter.py
+++ b/Lib/test/test_iter.py
@@ -54,6 +54,14 @@ class UnlimitedSequenceClass:
     def __getitem__(self, i):
         return i
 
+class DefaultIterClass:
+    pass
+
+class NoIterClass:
+    def __getitem__(self, i):
+        return i
+    __iter__ = None
+
 # Main test suite
 
 class TestCase(unittest.TestCase):
@@ -995,6 +1003,10 @@ class TestCase(unittest.TestCase):
     def test_free_after_iterating(self):
         check_free_after_iterating(self, iter, SequenceClass, (0,))
 
+    def test_error_iter(self):
+        for typ in (DefaultIterClass, NoIterClass):
+            self.assertRaises(TypeError, iter, typ())
+
 
 def test_main():
     run_unittest(TestCase)