diff --git a/samples/client/petstore/python/tests/test_deserialization.py b/samples/client/petstore/python/tests/test_deserialization.py
index b205c2f165e..1eae045ff76 100644
--- a/samples/client/petstore/python/tests/test_deserialization.py
+++ b/samples/client/petstore/python/tests/test_deserialization.py
@@ -163,6 +163,15 @@ class DeserializationTests(unittest.TestCase):
         self.assertTrue(isinstance(deserialized["foo"], dict))
         self.assertTrue(isinstance(deserialized["foo"]["bar"], int))
 
+    def test_deserialize_nested_list(self):
+        """ deserialize list[list[str]] """
+        data = [["foo"]]
+
+        deserialized = self.deserialize(data, "list[list[str]]")
+        self.assertTrue(isinstance(deserialized, list))
+        self.assertTrue(isinstance(deserialized[0], list))
+        self.assertTrue(isinstance(deserialized[0][0], str))
+
     def test_deserialize_none(self):
         """ deserialize None """
         deserialized = self.deserialize(None, "datetime")