Fix matrix of tests

.travis.yml

@@ -1,33 +1,26 @@
 dist: xenial
 language: python
-before_install: openssl version
-env:
-  # global:
-    # - secure: AifoKzwhjV94cmcQZrdQmqRu/9rkZZvWpwBv1daeAQpLOKFPGsOm3D+x2cSw9+iCfkgDZDfqQVv1kCaFVxTll8v8jTq5SJdqEY0NmGWbj/UkNtShh609oRDsuzLxAEwtVKYjf/h8K2BRea+bl1tGkwZ2vtmYS6dxNlAijjWOfds=
-    # - secure: LBSEg/gMj4u4Hrpo3zs6Y/1mTpd2RtcN49mZIFgTdbJ9IhpiNPqcEt647Lz94F9Eses2x2WbNuKqZKZZReY7QLbEzU1m0nN5jlaKrjcG5NR5clNABfFFyhgc0jBikyS4abAG8jc2efeaTrFuQwdoF4sE8YiVrkiVj2X5Xoi6sBk=
-  matrix:
-    - TOX_SUFFIX="requests"
-    - TOX_SUFFIX="httplib2"
-    - TOX_SUFFIX="boto3"
-    - TOX_SUFFIX="urllib3"
-    - TOX_SUFFIX="tornado4"
-    - TOX_SUFFIX="aiohttp"
-    - TOX_SUFFIX="httpx"
 matrix:
   include:
     # Only run lint on a single 3.x
     - env: TOX_SUFFIX="lint"
       python: "3.7"
+
 python:
   - "3.5"
   - "3.6"
   - "3.7"
   - "3.8"
   - "pypy3"
+
+before_install:
+  - openssl version
+  - sudo apt-get install libgnutls28-dev
+
 install:
   - pip install tox-travis codecov
   - if [[ $TOX_SUFFIX != 'lint' ]]; then python setup.py install ; fi
 script:
-  - tox -e "${TOX_SUFFIX}"
+  - tox
 after_success:
   - codecov