diff --git a/.travis.yml b/.travis.yml
index 083612627..b62eb7213 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,8 @@
 x-pyenv-shard: &x-pyenv-shard
   language: generic
-  # We use the TOX env var to roll up our tox execution strategy since it's more direct than an
-  # external CI script. We run tox with verbosity (-v) and an explicit envlist (-e). The latter
-  # is chosen over tox's support for TOXENV to allow more CI shards to share the same cache (Travis
-  # cache keys are a combination of os version, language version and env vars).
   env: &env >
     PYENV_ROOT="${HOME}/.pyenv_pex"
     PATH="${PYENV_ROOT}/shims:${PATH}"
-    TOX="tox -v -e"
   cache: &cache
     # The default is 3 minutes (180).
     timeout: 300
@@ -94,104 +89,104 @@ x-pypy: &x-pypy
 # caches as much as possible (eg: all linux python 2.7.15 shards share a cache).
 matrix:
   include:
-    - <<: *x-linux-shard
-      name: TOXENV=style
-      env: *x-py27
-      script: ${TOX} style
-
-    - <<: *x-linux-shard
-      name: TOXENV=isort-check
-      env: *x-py27
-      script: ${TOX} isort-check
-
-    - <<: *x-linux-shard
-      name: TOXENV=py27
-      env: *x-py27
-      script: ${TOX} py27
-
-    - <<: *x-linux-shard
-      name: TOXENV=py27-subprocess
-      env: *x-py27
-      script: ${TOX} py27-subprocess
-
-    - <<: *x-linux-shard
-      name: TOXENV=py27-requests
-      env: *x-py27
-      script: ${TOX} py27-requests
-
-    - <<: *x-linux-shard
-      name: TOXENV=py27-requests-cachecontrol
-      env: *x-py27
-      script: ${TOX} py27-requests-cachecontrol
-
-    - <<: *x-linux-shard
-      name: TOXENV=py34
-      env:
-        - *env
-        - PYENV_VERSION=3.4.9
-      script: ${TOX} py34
-
-    - <<: *x-linux-shard
-      name: TOXENV=py35
-      env:
-        - *env
-        - PYENV_VERSION=3.5.6
-      script: ${TOX} py35
-
-    - <<: *x-linux-shard
-      name: TOXENV=py36
-      env:
-        - *env
-        - PYENV_VERSION=3.6.6
-      script: ${TOX} py36
-
-    - <<: *x-linux-37-shard
-      name: TOXENV=py37
-      script: ${TOX} py37
-
-    - <<: *x-linux-37-shard
-      name: TOXENV=py37-requests
-      script: ${TOX} py37-requests
-
-    - <<: *x-linux-37-shard
-      name: TOXENV=py37-requests-cachecontrol
-      script: ${TOX} py37-requests-cachecontrol
-
-    - <<: *x-linux-shard
-      name: TOXENV=pypy
-      env: *x-pypy
-      script: ${TOX} pypy
-
-    - <<: *x-linux-shard
-      name: TOXENV=py27-integration
-      env: *x-py27
-      script: ${TOX} py27-integration
-
-    - <<: *x-linux-37-shard
-      name: TOXENV=py37-integration
-      script: ${TOX} py37-integration
-
-    - <<: *x-linux-shard
-      name: TOXENV=pypy-integration
-      env: *x-pypy
-      script: ${TOX} pypy-integration
+#    - <<: *x-linux-shard
+#      name: TOXENV=style
+#      env: *x-py27
+#      script: tox -ve style
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=isort-check
+#      env: *x-py27
+#      script: tox -ve isort-check
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py27
+#      env: *x-py27
+#      script: tox -ve py27
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py27-subprocess
+#      env: *x-py27
+#      script: tox -ve py27-subprocess
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py27-requests
+#      env: *x-py27
+#      script: tox -ve py27-requests
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py27-requests-cachecontrol
+#      env: *x-py27
+#      script: tox -ve py27-requests-cachecontrol
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py34
+#      env:
+#        - *env
+#        - PYENV_VERSION=3.4.9
+#      script: tox -ve py34
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py35
+#      env:
+#        - *env
+#        - PYENV_VERSION=3.5.6
+#      script: tox -ve py35
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py36
+#      env:
+#        - *env
+#        - PYENV_VERSION=3.6.6
+#      script: tox -ve py36
+#
+#    - <<: *x-linux-37-shard
+#      name: TOXENV=py37
+#      script: tox -ve py37
+#
+#    - <<: *x-linux-37-shard
+#      name: TOXENV=py37-requests
+#      script: tox -ve py37-requests
+#
+#    - <<: *x-linux-37-shard
+#      name: TOXENV=py37-requests-cachecontrol
+#      script: tox -ve py37-requests-cachecontrol
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=pypy
+#      env: *x-pypy
+#      script: tox -ve pypy
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=py27-integration
+#      env: *x-py27
+#      script: tox -ve py27-integration
+#
+#    - <<: *x-linux-37-shard
+#      name: TOXENV=py37-integration
+#      script: tox -ve py37-integration
+#
+#    - <<: *x-linux-shard
+#      name: TOXENV=pypy-integration
+#      env: *x-pypy
+#      script: tox -ve pypy-integration
 
     - <<: *x-osx-shard
       name: TOXENV=py27-requests
       env: *x-py27
-      script: ${TOX} py27-requests
-
-    - <<: *x-osx-shard
-      name: TOXENV=py37-requests
-      env: *x-py37
-      script: ${TOX} py37-requests
-
-    - <<: *x-osx-shard
-      name: TOXENV=py27-integration
-      env: *x-py27
-      script: ${TOX} py27-integration
-
-    - <<: *x-osx-shard
-      name: TOXENV=py37-integration
-      env: *x-py37
-      script: ${TOX} py37-integration
+      script: tox -ve py27-requests -- -vsktest_osx_platform_intel
+
+#    - <<: *x-osx-shard
+#      name: TOXENV=py37-requests
+#      env: *x-py37
+#      script: tox -ve py37-requests
+#
+#    - <<: *x-osx-shard
+#      name: TOXENV=py27-integration
+#      env: *x-py27
+#      script: tox -ve py27-integration
+#
+#    - <<: *x-osx-shard
+#      name: TOXENV=py37-integration
+#      env: *x-py37
+#      script: tox -ve py37-integration