diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index b3aca42..56172f8 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -161,8 +161,9 @@
 # Timeout for Ironic power transitions. (integer value)
 #power_timeout = 60
 
-# Timeout for unprovisioning an Ironic node. (integer value)
-#unprovision_timeout = 60
+# Timeout for unprovisioning an Ironic node. Takes longer since Kilo
+# as Ironic performs an extra step in Node cleaning. (integer value)
+#unprovision_timeout = 300
 
 
 [boto]
diff --git a/tempest/api/compute/security_groups/test_security_groups_negative.py b/tempest/api/compute/security_groups/test_security_groups_negative.py
index 2cf2e28..06e073d 100644
--- a/tempest/api/compute/security_groups/test_security_groups_negative.py
+++ b/tempest/api/compute/security_groups/test_security_groups_negative.py
@@ -89,15 +89,10 @@
     @test.idempotent_id('777b6f14-aca9-4758-9e84-38783cfa58bc')
     @test.services('network')
     def test_security_group_create_with_invalid_group_description(self):
-        # Negative test:Security Group should not be created with description
-        # as an empty string/with white spaces/chars more than 255
+        # Negative test: Security Group should not be created with description
+        # longer than 255 chars. Empty description is allowed by the API
+        # reference, however.
         s_name = data_utils.rand_name('securitygroup')
-        # Create Security Group with empty string as description
-        self.assertRaises(lib_exc.BadRequest,
-                          self.client.create_security_group, s_name, "")
-        # Create Security Group with white space in description
-        self.assertRaises(lib_exc.BadRequest,
-                          self.client.create_security_group, s_name, " ")
         # Create Security Group with group description longer than 255 chars
         s_description = 'description-'.ljust(260, '0')
         self.assertRaises(lib_exc.BadRequest,
diff --git a/tempest/config.py b/tempest/config.py
index 603ccd2..bbd6772 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -1114,8 +1114,10 @@
                default=60,
                help="Timeout for Ironic power transitions."),
     cfg.IntOpt('unprovision_timeout',
-               default=60,
-               help="Timeout for unprovisioning an Ironic node.")
+               default=300,
+               help="Timeout for unprovisioning an Ironic node. "
+                    "Takes longer since Kilo as Ironic performs an extra "
+                    "step in Node cleaning.")
 ]
 
 negative_group = cfg.OptGroup(name='negative', title="Negative Test Options")