diff --git a/tempest/scenario/test_network_v6.py b/tempest/scenario/test_network_v6.py
index 64a4c9b..40b3317 100644
--- a/tempest/scenario/test_network_v6.py
+++ b/tempest/scenario/test_network_v6.py
@@ -50,7 +50,7 @@
             msg = ('Either project_networks_reachable must be "true", or '
                    'public_network_id must be defined.')
             raise cls.skipException(msg)
-        if not CONF.network.shared_physical_network:
+        if CONF.network.shared_physical_network:
             msg = 'Deployment uses a shared physical network'
             raise cls.skipException(msg)
 
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index a71799a..f8c5c0a 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -142,7 +142,7 @@
         if not test.is_extension_enabled('security-group', 'network'):
             msg = "security-group extension not enabled."
             raise cls.skipException(msg)
-        if not CONF.network.shared_physical_network:
+        if CONF.network.shared_physical_network:
             msg = ('Deployment uses a shared physical network, security '
                    'groups not supported')
             raise cls.skipException(msg)