Avoid password prompt on newgrp

diff --git a/.travis.yml b/.travis.yml
index ebf16d0..97b8cdb 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ before_install:
   - sudo add-apt-repository ppa:juju/daily -y
   - sudo apt-get update -q
   - sudo apt-get install lxd juju -y
-  - newgrp lxd
+  - sudo newgrp lxd
   - groups
   - sudo lxd init --auto
 install: pip install tox-travis