Fix CI?

.travis.yml

@@ -6,7 +6,7 @@ addons:
   chrome: stable
 before_install:
   - sudo apt-get install -y python3-pillow python3-numpy python3-pip mesa-utils libgl1-mesa-dri libglapi-mesa libosmesa6 python3-setuptools
-  - sudo pip3 install selenium
+  - sudo pip3 install selenium requests
 install:
   - CHROME_VERSION=`google-chrome --version | sed -r 's/Google Chrome ([0-9]+\.[0-9]+\.[0-9]+).*/\1/'`
   - LATEST_CHROMEDRIVER_VERSION=`curl -s "https://chromedriver.storage.googleapis.com/LATEST_RELEASE_${CHROME_VERSION}"`