diff --git a/tempest/common/commands.py b/tempest/common/commands.py
index af7a692..6405eaa 100644
--- a/tempest/common/commands.py
+++ b/tempest/common/commands.py
@@ -29,7 +29,8 @@
     subprocess_args = {'stdout': subprocess.PIPE,
                        'stderr': subprocess.STDOUT}
     try:
-        proc = subprocess.Popen(['/usr/bin/sudo'] + args, **subprocess_args)
+        proc = subprocess.Popen(['/usr/bin/sudo', '-n'] + args,
+                                **subprocess_args)
         return proc.communicate()[0]
         if proc.returncode != 0:
             LOG.error(cmd + "returned with: " +