diff -r 1f57839b7b4b Lib/csv.py
--- a/Lib/csv.py	Wed Jun 17 10:08:44 2015 -0500
+++ b/Lib/csv.py	Wed Jun 17 19:45:51 2015 +0200
@@ -13,11 +13,12 @@
 
 from io import StringIO
 
-__all__ = [ "QUOTE_MINIMAL", "QUOTE_ALL", "QUOTE_NONNUMERIC", "QUOTE_NONE",
-            "Error", "Dialect", "__doc__", "excel", "excel_tab",
-            "field_size_limit", "reader", "writer",
-            "register_dialect", "get_dialect", "list_dialects", "Sniffer",
-            "unregister_dialect", "__version__", "DictReader", "DictWriter" ]
+__all__ = ["QUOTE_MINIMAL", "QUOTE_ALL", "QUOTE_NONNUMERIC", "QUOTE_NONE",
+           "Error", "Dialect", "__doc__", "excel", "excel_tab",
+           "field_size_limit", "reader", "writer",
+           "register_dialect", "get_dialect", "list_dialects", "Sniffer",
+           "unregister_dialect", "__version__", "DictReader", "DictWriter",
+           "unix_dialect"]
 
 class Dialect:
     """Describe a CSV dialect.
diff -r 1f57839b7b4b Lib/test/test_csv.py
--- a/Lib/test/test_csv.py	Wed Jun 17 10:08:44 2015 -0500
+++ b/Lib/test/test_csv.py	Wed Jun 17 19:45:51 2015 +0200
@@ -1084,5 +1084,20 @@
             self.assertEqual(fileobj.read(), expected)
 
 
+class MiscTestCase(unittest.TestCase):
+    def test__all__(self):
+        # QUOTE_* do not provide __module__ attribute.
+        expected = {'__doc__', '__version__', 'QUOTE_MINIMAL', 'QUOTE_ALL',
+                    'QUOTE_NONNUMERIC', 'QUOTE_NONE',
+                    }
+        for name in dir(csv):
+            if name.startswith('_'):
+                continue
+            module_object = getattr(csv, name)
+            if getattr(module_object, '__module__', None) in ('csv', '_csv'):
+                expected.add(name)
+        self.assertCountEqual(csv.__all__, expected)
+
+
 if __name__ == '__main__':
     unittest.main()