diff --git a/tempest/config.py b/tempest/config.py
index 167a0c6..0a220a3 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -961,7 +961,7 @@
                help='Type of key to use for ssh connections. '
                     'Valid types are rsa, ecdsa'),
     cfg.FloatOpt('allowed_network_downtime',
-                 default=5.0,
+                 default=10.0,
                  help="Allowed VM network connection downtime during live "
                       "migration, in seconds. "
                       "When the measured downtime exceeds this value, an "