diff --git a/os_brick/encryptors/nop.py b/os_brick/encryptors/nop.py
index 02754a915..16c48a507 100644
--- a/os_brick/encryptors/nop.py
+++ b/os_brick/encryptors/nop.py
@@ -36,8 +36,8 @@ class NoOpEncryptor(base.VolumeEncryptor):
             execute=execute,
             *args, **kwargs)
 
-    def attach_volume(self, context):
+    def attach_volume(self, context, **kwargs):
         pass
 
-    def detach_volume(self):
+    def detach_volume(self, **kwargs):
         pass
diff --git a/os_brick/tests/encryptors/test_nop.py b/os_brick/tests/encryptors/test_nop.py
index 3d4613211..2282f7a78 100644
--- a/os_brick/tests/encryptors/test_nop.py
+++ b/os_brick/tests/encryptors/test_nop.py
@@ -24,7 +24,15 @@ class NoOpEncryptorTestCase(test_base.VolumeEncryptorTestCase):
                                  keymgr=self.keymgr)
 
     def test_attach_volume(self):
-        self.encryptor.attach_volume(None)
+        test_args = {
+            'control_location': 'front-end',
+            'provider': 'NoOpEncryptor',
+        }
+        self.encryptor.attach_volume(None, **test_args)
 
     def test_detach_volume(self):
-        self.encryptor.detach_volume()
+        test_args = {
+            'control_location': 'front-end',
+            'provider': 'NoOpEncryptor',
+        }
+        self.encryptor.detach_volume(**test_args)