-y switch

.travis.yml

-
 matrix:
   include:
     - os: osx
-    - os: linux
-      dist: trusty
+    - dist: trusty
 
 env:
 - PYENV_PYTHON_VERSION=3.5.0

ci/travis/before_install.sh

@@ -11,7 +11,7 @@ then
 elif [ $TRAVIS_OS_NAME == "linux" ]
 then
     sudo apt-get update
-    sudo apt-get install libxcb1 libxcb1-dev libx11-xcb1 libx11-xcb-dev libxcb-keysyms1 libxcb-keysyms1-dev libxcb-image0 \
+    sudo apt-get install -qq -y libxcb1 libxcb1-dev libx11-xcb1 libx11-xcb-dev libxcb-keysyms1 libxcb-keysyms1-dev libxcb-image0 \
             libxcb-image0-dev libxcb-shm0 libxcb-shm0-dev libxcb-icccm4 libxcb-icccm4-dev \
             libxcb-xfixes0-dev libxrender-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0 \
             libxcb-render-util0-dev libxcb-glx0-dev libgl1-mesa-dri libegl1-mesa libpcre3-dev \