PyQt not properly installing durig tests

Author: einarf

.travis.yml

@@ -11,7 +11,7 @@ install:
   - export DISPLAY=:99.0; sh -e /etc/init.d/xvfb start
   - pip install -U setuptools
   - pip install tox
-  - pip install pytest
+  - pip install -r requirements-test.txt
   - python setup.py develop
 
 script:

requirements-test.txt

@@ -1 +1,2 @@
 pytest==3.7.2
+PyQt5==5.11.2