Travis changes.

.travis.yml

@@ -1,5 +1,4 @@
-language:
-- python
+language: python
 python:
   - "2.7"
 # whitelist of git branches to build
@@ -8,12 +7,13 @@ branches:
     - master
 # install required programs
 before_install:
-  - sudo apt-get update -qq
-  - sudo apt-get install -qq python-dev qt4-dev-tools
+  - sudo apt-get update -q -y
+  - sudo apt-get install -q -y python-dev qt4-dev-tools
 # command to install dependencies
 install:
   - pip install -r requirements.txt --use-mirrors
-  - pip install pyftpdlib
+  - pip install pyftpdlib --use-mirrors
+  - pip install pytest-xdist --use-mirrors
 # command to run tests
 script: make test PYTESTOPTS="--tb=short" TESTS="tests/test_*.py tests/cache/test_*.py tests/configuration/test_*.py tests/logger/test_*.py"
 # do not send emails of broken builds