diff --git a/moto/sqs/models.py b/moto/sqs/models.py
index dbc17038..0a268e9e 100644
--- a/moto/sqs/models.py
+++ b/moto/sqs/models.py
@@ -286,6 +286,8 @@ class Queue(BaseModel):
             attr = getattr(self, camelcase_to_underscores(attribute))
             if isinstance(attr, bool):
                 attr = str(attr).lower()
+            elif attribute == 'RedrivePolicy':
+                attr = json.dumps(attr)
             result[attribute] = attr
         return result