- PickleType will compare using `==` when set up with mutable=False,

and not the `is` operator.  To use `is` or any other comparator, send
in a custom comparison function using PickleType(comparator=my_custom_comparator).

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sqlalchemy/types.py b/lib/sqlalchemy/types.py
index 48a6af030..b27530987 100644
--- a/lib/sqlalchemy/types.py
+++ b/lib/sqlalchemy/types.py
@@ -501,7 +501,7 @@ class PickleType(MutableType, TypeDecorator):
         elif self.mutable:
             return self.pickler.dumps(x, self.protocol) == self.pickler.dumps(y, self.protocol)
         else:
-            return x is y
+            return x == y
 
     def is_mutable(self):
         return self.mutable