diff --git a/CHANGES.md b/CHANGES.md
index b0782a9..71cd9e0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,12 @@
 # SQLAlchemy-JSONAPI Changelog
 
+## 4.0.9
+
+*Unreleased*
+
+* Fixed bug during testing in delete_relationship where returned resource was missing data key
+* Fixed bug during testing in patch_resource where field check was failing
+
 ## 4.0.8
 
 *2016-04-32*
diff --git a/setup.py b/setup.py
index b4672c9..4f72f56 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
       requirements.append('enum34')
 
 setup(name='SQLAlchemy-JSONAPI',
-      version='4.0.8',
+      version='4.0.9',
       url='http://github.com/coltonprovias/sqlalchemy-jsonapi',
       license='MIT',
       author='Colton J. Provias',
diff --git a/sqlalchemy_jsonapi/serializer.py b/sqlalchemy_jsonapi/serializer.py
index 3095b82..16dcef1 100644
--- a/sqlalchemy_jsonapi/serializer.py
+++ b/sqlalchemy_jsonapi/serializer.py
@@ -140,7 +140,7 @@ def __init__(self):
         self.status_code = 200
         self.data = {
             'jsonapi': {'version': '1.0'},
-            'meta': {'sqlalchemy_jsonapi_version': '4.0.8'}
+            'meta': {'sqlalchemy_jsonapi_version': '4.0.9'}
         }
 
 
@@ -548,7 +548,7 @@ def delete_relationship(self, session, data, api_type, obj_id, rel_key):
             return ToManyExpectedError(model, resource, relationship)
 
         response = JSONAPIResponse()
-        response.data = []
+        response.data = {'data': []}
 
         session.add(resource)
 
@@ -884,12 +884,13 @@ def patch_resource(self, session, json_data, api_type, obj_id):
         json_data['data'].setdefault('relationships', {})
         json_data['data'].setdefault('attributes', {})
 
-        data_keys = set(map((lambda x: resource.__jsonapi_map_to_py__.get(x, None)), json_data['data'].get('relationships', {}).keys()))
-        model_keys = set(resource.__mapper__.relationships.keys())
-        if not data_keys <= model_keys:
+        missing_keys = set(json_data['data'].get('relationships', {}).keys()) \
+            - set(resource.__jsonapi_map_to_py__.keys())
+
+        if missing_keys:
             raise BadRequestError(
                 '{} not relationships for {}.{}'.format(
-                    ', '.join(list(data_keys - model_keys)),
+                    ', '.join(list(missing_keys)),
                     model.__jsonapi_type__, resource.id))
 
         attrs_to_ignore = {'__mapper__', 'id'}