diff --git a/cinderclient/base.py b/cinderclient/base.py
index 1ee621ae9..6024f59c3 100644
--- a/cinderclient/base.py
+++ b/cinderclient/base.py
@@ -18,7 +18,7 @@
 """
 Base utilities to build API operation managers and objects on top of.
 """
-
+import abc
 import contextlib
 import hashlib
 import os
@@ -167,6 +167,12 @@ class ManagerWithFind(Manager):
     """
     Like a `Manager`, but with additional `find()`/`findall()` methods.
     """
+    __metaclass__ = abc.ABCMeta
+
+    @abc.abstractmethod
+    def list(self):
+        pass
+
     def find(self, **kwargs):
         """
         Find a single item with attributes matching ``**kwargs``.
@@ -204,9 +210,6 @@ class ManagerWithFind(Manager):
 
         return found
 
-    def list(self):
-        raise NotImplementedError
-
 
 class Resource(object):
     """
diff --git a/cinderclient/v1/quota_classes.py b/cinderclient/v1/quota_classes.py
index 6aa4fdc40..caadd486f 100644
--- a/cinderclient/v1/quota_classes.py
+++ b/cinderclient/v1/quota_classes.py
@@ -28,7 +28,7 @@ class QuotaClassSet(base.Resource):
         self.manager.update(self.class_name, *args, **kwargs)
 
 
-class QuotaClassSetManager(base.ManagerWithFind):
+class QuotaClassSetManager(base.Manager):
     resource_class = QuotaClassSet
 
     def get(self, class_name):
diff --git a/cinderclient/v1/quotas.py b/cinderclient/v1/quotas.py
index 2ac22dfc3..846fb13b2 100644
--- a/cinderclient/v1/quotas.py
+++ b/cinderclient/v1/quotas.py
@@ -28,7 +28,7 @@ class QuotaSet(base.Resource):
         self.manager.update(self.tenant_id, *args, **kwargs)
 
 
-class QuotaSetManager(base.ManagerWithFind):
+class QuotaSetManager(base.Manager):
     resource_class = QuotaSet
 
     def get(self, tenant_id):
diff --git a/cinderclient/v1/volume_backups_restore.py b/cinderclient/v1/volume_backups_restore.py
index 9405f12ff..faf9e09bf 100644
--- a/cinderclient/v1/volume_backups_restore.py
+++ b/cinderclient/v1/volume_backups_restore.py
@@ -27,7 +27,7 @@ class VolumeBackupsRestore(base.Resource):
         return "<VolumeBackupsRestore: %s>" % self.id
 
 
-class VolumeBackupRestoreManager(base.ManagerWithFind):
+class VolumeBackupRestoreManager(base.Manager):
     """Manage :class:`VolumeBackupsRestore` resources."""
     resource_class = VolumeBackupsRestore
 
diff --git a/cinderclient/v2/quota_classes.py b/cinderclient/v2/quota_classes.py
index d8b3e2f20..cc0b75320 100644
--- a/cinderclient/v2/quota_classes.py
+++ b/cinderclient/v2/quota_classes.py
@@ -27,7 +27,7 @@ class QuotaClassSet(base.Resource):
         self.manager.update(self.class_name, *args, **kwargs)
 
 
-class QuotaClassSetManager(base.ManagerWithFind):
+class QuotaClassSetManager(base.Manager):
     resource_class = QuotaClassSet
 
     def get(self, class_name):
diff --git a/cinderclient/v2/quotas.py b/cinderclient/v2/quotas.py
index 803d72cce..7c9db9006 100644
--- a/cinderclient/v2/quotas.py
+++ b/cinderclient/v2/quotas.py
@@ -27,7 +27,7 @@ class QuotaSet(base.Resource):
         self.manager.update(self.tenant_id, *args, **kwargs)
 
 
-class QuotaSetManager(base.ManagerWithFind):
+class QuotaSetManager(base.Manager):
     resource_class = QuotaSet
 
     def get(self, tenant_id):
diff --git a/cinderclient/v2/volume_backups_restore.py b/cinderclient/v2/volume_backups_restore.py
index 9405f12ff..faf9e09bf 100644
--- a/cinderclient/v2/volume_backups_restore.py
+++ b/cinderclient/v2/volume_backups_restore.py
@@ -27,7 +27,7 @@ class VolumeBackupsRestore(base.Resource):
         return "<VolumeBackupsRestore: %s>" % self.id
 
 
-class VolumeBackupRestoreManager(base.ManagerWithFind):
+class VolumeBackupRestoreManager(base.Manager):
     """Manage :class:`VolumeBackupsRestore` resources."""
     resource_class = VolumeBackupsRestore