diff --git a/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py b/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py
index c788181..87bd379 100644
--- a/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py
+++ b/tempest/tests/lib/services/volume/v3/test_encryption_types_client.py
@@ -30,6 +30,15 @@
         }
     }
 
+    UPDATE_ENCRYPTION_TYPE = {
+        "encryption": {
+            "key_size": 64,
+            "provider": "LuksEncryptor",
+            "control_location": "front-end",
+            "cipher": "aes-xts-plain64"
+        }
+    }
+
     FAKE_INFO_ENCRYPTION_TYPE = {
         "encryption": {
             "name": "FakeEncryptionType",
@@ -50,10 +59,8 @@
     def setUp(self):
         super(TestEncryptionTypesClient, self).setUp()
         fake_auth = fake_auth_provider.FakeAuthProvider()
-        self.client = encryption_types_client.EncryptionTypesClient(fake_auth,
-                                                                    'volume',
-                                                                    'regionOne'
-                                                                    )
+        self.client = encryption_types_client.EncryptionTypesClient(
+            fake_auth, 'volume', 'regionOne')
 
     def _test_create_encryption(self, bytes_body=False):
         self.check_service_client_function(
@@ -101,3 +108,16 @@
             {},
             volume_type_id="cbc36478b0bd8e67e89",
             status=202)
+
+    def test_update_encryption_type_with_str_body(self):
+        self._test_update_encryption_type()
+
+    def test_update_encryption_type_with_bytes_body(self):
+        self._test_update_encryption_type(bytes_body=True)
+
+    def _test_update_encryption_type(self, bytes_body=False):
+        self.check_service_client_function(
+            self.client.update_encryption_type,
+            'tempest.lib.common.rest_client.RestClient.put',
+            self.UPDATE_ENCRYPTION_TYPE,
+            bytes_body, volume_type_id="cbc36478b0bd8e67e89")