diff --git a/mistralclient/api/base.py b/mistralclient/api/base.py
index 0d207ecb..44018e89 100644
--- a/mistralclient/api/base.py
+++ b/mistralclient/api/base.py
@@ -12,6 +12,7 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 
+import copy
 import json
 import logging
 
@@ -41,6 +42,9 @@ class Resource(object):
                 # In this case we already defined the attribute on the class
                 pass
 
+    def to_dict(self):
+        return copy.deepcopy(self._data)
+
     def __str__(self):
         vals = ", ".join(["%s='%s'" % (n, v)
                           for n, v in self._data.items()])
diff --git a/mistralclient/tests/unit/v2/test_action_executions.py b/mistralclient/tests/unit/v2/test_action_executions.py
index d4236f54..009eb085 100644
--- a/mistralclient/tests/unit/v2/test_action_executions.py
+++ b/mistralclient/tests/unit/v2/test_action_executions.py
@@ -46,7 +46,7 @@ class TestActionExecutions(base.BaseClientV2Test):
         self.assertIsNotNone(action_execution)
         self.assertEqual(action_executions.ActionExecution(
             self.action_executions, ACTION_EXEC
-        ).__dict__, action_execution.__dict__)
+        ).to_dict(), action_execution.to_dict())
 
         mock.assert_called_once_with(
             URL_TEMPLATE, json.dumps(body))
@@ -65,7 +65,7 @@ class TestActionExecutions(base.BaseClientV2Test):
         self.assertIsNotNone(action_execution)
         self.assertEqual(action_executions.ActionExecution(
             self.action_executions, ACTION_EXEC
-        ).__dict__, action_execution.__dict__)
+        ).to_dict(), action_execution.to_dict())
 
         mock.assert_called_once_with(
             URL_TEMPLATE_ID % ACTION_EXEC['id'], json.dumps(body))
@@ -82,7 +82,7 @@ class TestActionExecutions(base.BaseClientV2Test):
 
         self.assertEqual(action_executions.ActionExecution(
             self.action_executions, ACTION_EXEC
-        ).__dict__, action_execution.__dict__)
+        ).to_dict(), action_execution.to_dict())
 
         mock.assert_called_once_with(URL_TEMPLATE)
 
@@ -93,7 +93,7 @@ class TestActionExecutions(base.BaseClientV2Test):
 
         self.assertEqual(action_executions.ActionExecution(
             self.action_executions, ACTION_EXEC
-        ).__dict__, action_execution.__dict__)
+        ).to_dict(), action_execution.to_dict())
 
         mock.assert_called_once_with(
             URL_TEMPLATE_ID % ACTION_EXEC['id'])
diff --git a/mistralclient/tests/unit/v2/test_environments.py b/mistralclient/tests/unit/v2/test_environments.py
index a86d5cba..4628ada6 100644
--- a/mistralclient/tests/unit/v2/test_environments.py
+++ b/mistralclient/tests/unit/v2/test_environments.py
@@ -69,8 +69,8 @@ class TestEnvironmentsV2(base.BaseClientV2Test):
         env = environment_list[0]
 
         self.assertDictEqual(
-            environments.Environment(self.environments, ENVIRONMENT).__dict__,
-            env.__dict__
+            environments.Environment(self.environments, ENVIRONMENT).to_dict(),
+            env.to_dict()
         )
 
         mock.assert_called_once_with(URL_TEMPLATE)
@@ -82,8 +82,8 @@ class TestEnvironmentsV2(base.BaseClientV2Test):
 
         self.assertIsNotNone(env)
         self.assertDictEqual(
-            environments.Environment(self.environments, ENVIRONMENT).__dict__,
-            env.__dict__
+            environments.Environment(self.environments, ENVIRONMENT).to_dict(),
+            env.to_dict()
         )
 
         mock.assert_called_once_with(URL_TEMPLATE_NAME % 'env')
diff --git a/mistralclient/tests/unit/v2/test_executions.py b/mistralclient/tests/unit/v2/test_executions.py
index 2b7fad36..71677e33 100644
--- a/mistralclient/tests/unit/v2/test_executions.py
+++ b/mistralclient/tests/unit/v2/test_executions.py
@@ -52,8 +52,8 @@ class TestExecutionsV2(base.BaseClientV2Test):
                                     EXEC['input'])
 
         self.assertIsNotNone(ex)
-        self.assertEqual(executions.Execution(self.executions, EXEC).__dict__,
-                         ex.__dict__)
+        self.assertEqual(executions.Execution(self.executions, EXEC).to_dict(),
+                         ex.to_dict())
         mock.assert_called_once_with(URL_TEMPLATE, json.dumps(body))
 
     @unittest2.expectedFailure
@@ -76,8 +76,8 @@ class TestExecutionsV2(base.BaseClientV2Test):
         ex = self.executions.update(EXEC['id'], EXEC['state'])
 
         self.assertIsNotNone(ex)
-        self.assertEqual(executions.Execution(self.executions, EXEC).__dict__,
-                         ex.__dict__)
+        self.assertEqual(executions.Execution(self.executions, EXEC).to_dict(),
+                         ex.to_dict())
         mock.assert_called_once_with(
             URL_TEMPLATE_ID % EXEC['id'], json.dumps(body))
 
@@ -89,8 +89,8 @@ class TestExecutionsV2(base.BaseClientV2Test):
         self.assertEqual(1, len(execution_list))
         ex = execution_list[0]
 
-        self.assertEqual(executions.Execution(self.executions, EXEC).__dict__,
-                         ex.__dict__)
+        self.assertEqual(executions.Execution(self.executions, EXEC).to_dict(),
+                         ex.to_dict())
         mock.assert_called_once_with(URL_TEMPLATE)
 
     def test_get(self):
@@ -98,8 +98,8 @@ class TestExecutionsV2(base.BaseClientV2Test):
 
         ex = self.executions.get(EXEC['id'])
 
-        self.assertEqual(executions.Execution(self.executions, EXEC).__dict__,
-                         ex.__dict__)
+        self.assertEqual(executions.Execution(self.executions, EXEC).to_dict(),
+                         ex.to_dict())
         mock.assert_called_once_with(URL_TEMPLATE_ID % EXEC['id'])
 
     def test_delete(self):
diff --git a/mistralclient/tests/unit/v2/test_tasks.py b/mistralclient/tests/unit/v2/test_tasks.py
index a0ef459f..0daf2104 100644
--- a/mistralclient/tests/unit/v2/test_tasks.py
+++ b/mistralclient/tests/unit/v2/test_tasks.py
@@ -41,7 +41,10 @@ class TestTasksV2(base.BaseClientV2Test):
         self.assertEqual(1, len(task_list))
         task = task_list[0]
 
-        self.assertEqual(tasks.Task(self.tasks, TASK).__dict__, task.__dict__)
+        self.assertEqual(
+            tasks.Task(self.tasks, TASK).to_dict(),
+            task.to_dict()
+        )
         mock.assert_called_once_with(URL_TEMPLATE)
 
     def test_get(self):
@@ -49,6 +52,9 @@ class TestTasksV2(base.BaseClientV2Test):
 
         task = self.tasks.get(TASK['id'])
 
-        self.assertEqual(tasks.Task(self.tasks, TASK).__dict__, task.__dict__)
+        self.assertEqual(
+            tasks.Task(self.tasks, TASK).to_dict(),
+            task.to_dict()
+        )
         mock.assert_called_once_with(
             URL_TEMPLATE_ID % TASK['id'])
diff --git a/mistralclient/tests/unit/v2/test_workbooks.py b/mistralclient/tests/unit/v2/test_workbooks.py
index c0c28981..1dc3f833 100644
--- a/mistralclient/tests/unit/v2/test_workbooks.py
+++ b/mistralclient/tests/unit/v2/test_workbooks.py
@@ -103,8 +103,8 @@ class TestWorkbooksV2(base.BaseClientV2Test):
         wb = workbook_list[0]
 
         self.assertEqual(
-            workbooks.Workbook(self.workbooks, WORKBOOK).__dict__,
-            wb.__dict__
+            workbooks.Workbook(self.workbooks, WORKBOOK).to_dict(),
+            wb.to_dict()
         )
 
         mock.assert_called_once_with(URL_TEMPLATE)
@@ -116,8 +116,8 @@ class TestWorkbooksV2(base.BaseClientV2Test):
 
         self.assertIsNotNone(wb)
         self.assertEqual(
-            workbooks.Workbook(self.workbooks, WORKBOOK).__dict__,
-            wb.__dict__
+            workbooks.Workbook(self.workbooks, WORKBOOK).to_dict(),
+            wb.to_dict()
         )
 
         mock.assert_called_once_with(URL_TEMPLATE_NAME % 'wb')