diff --git a/tempest/api/compute/admin/test_flavors_extra_specs.py b/tempest/api/compute/admin/test_flavors_extra_specs.py
index 6866c1a..6060e72 100644
--- a/tempest/api/compute/admin/test_flavors_extra_specs.py
+++ b/tempest/api/compute/admin/test_flavors_extra_specs.py
@@ -71,7 +71,7 @@
         specs = {"key1": "value1", "key2": "value2"}
         # SET extra specs to the flavor created in setUp
         set_body = \
-            self.client.set_flavor_extra_spec(self.flavor['id'], specs)
+            self.client.set_flavor_extra_spec(self.flavor['id'], **specs)
         self.assertEqual(set_body, specs)
         # GET extra specs and verify
         get_body = self.client.list_flavor_extra_specs(self.flavor['id'])
@@ -96,7 +96,7 @@
     @test.idempotent_id('a99dad88-ae1c-4fba-aeb4-32f898218bd0')
     def test_flavor_non_admin_get_all_keys(self):
         specs = {"key1": "value1", "key2": "value2"}
-        self.client.set_flavor_extra_spec(self.flavor['id'], specs)
+        self.client.set_flavor_extra_spec(self.flavor['id'], **specs)
         body = self.flavors_client.list_flavor_extra_specs(self.flavor['id'])
 
         for key in specs:
@@ -104,8 +104,8 @@
 
     @test.idempotent_id('12805a7f-39a3-4042-b989-701d5cad9c90')
     def test_flavor_non_admin_get_specific_key(self):
-        specs = {"key1": "value1", "key2": "value2"}
-        body = self.client.set_flavor_extra_spec(self.flavor['id'], specs)
+        body = self.client.set_flavor_extra_spec(self.flavor['id'],
+                                                 key1="value1", key2="value2")
         self.assertEqual(body['key1'], 'value1')
         self.assertIn('key2', body)
         body = self.flavors_client.show_flavor_extra_spec(
diff --git a/tempest/api/compute/admin/test_flavors_extra_specs_negative.py b/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
index 8c5a103..fbb0822 100644
--- a/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
+++ b/tempest/api/compute/admin/test_flavors_extra_specs_negative.py
@@ -70,19 +70,17 @@
     @test.idempotent_id('a00a3b81-5641-45a8-ab2b-4a8ec41e1d7d')
     def test_flavor_non_admin_set_keys(self):
         # Test to SET flavor extra spec as a user without admin privileges.
-        specs = {"key1": "value1", "key2": "value2"}
         self.assertRaises(lib_exc.Forbidden,
                           self.flavors_client.set_flavor_extra_spec,
                           self.flavor['id'],
-                          specs)
+                          key1="value1", key2="value2")
 
     @test.attr(type=['negative'])
     @test.idempotent_id('1ebf4ef8-759e-48fe-a801-d451d80476fb')
     def test_flavor_non_admin_update_specific_key(self):
         # non admin user is not allowed to update flavor extra spec
-        specs = {"key1": "value1", "key2": "value2"}
         body = self.client.set_flavor_extra_spec(
-            self.flavor['id'], specs)
+            self.flavor['id'], key1="value1", key2="value2")
         self.assertEqual(body['key1'], 'value1')
         self.assertRaises(lib_exc.Forbidden,
                           self.flavors_client.
@@ -94,8 +92,8 @@
     @test.attr(type=['negative'])
     @test.idempotent_id('28f12249-27c7-44c1-8810-1f382f316b11')
     def test_flavor_non_admin_unset_keys(self):
-        specs = {"key1": "value1", "key2": "value2"}
-        self.client.set_flavor_extra_spec(self.flavor['id'], specs)
+        self.client.set_flavor_extra_spec(self.flavor['id'],
+                                          key1="value1", key2="value2")
 
         self.assertRaises(lib_exc.Forbidden,
                           self.flavors_client.unset_flavor_extra_spec,
diff --git a/tempest/services/compute/json/flavors_client.py b/tempest/services/compute/json/flavors_client.py
index b928f9f..ee2f74c 100644
--- a/tempest/services/compute/json/flavors_client.py
+++ b/tempest/services/compute/json/flavors_client.py
@@ -92,9 +92,9 @@
         """Returns the primary type of resource this client works with."""
         return 'flavor'
 
-    def set_flavor_extra_spec(self, flavor_id, specs):
+    def set_flavor_extra_spec(self, flavor_id, **kwargs):
         """Sets extra Specs to the mentioned flavor."""
-        post_body = json.dumps({'extra_specs': specs})
+        post_body = json.dumps({'extra_specs': kwargs})
         resp, body = self.post('flavors/%s/os-extra_specs' % flavor_id,
                                post_body)
         body = json.loads(body)