add tox version pinning for Python 3.3 in Travis (#19)

2018-08-14 10:46:52 -07:00 · 2018-08-14 10:46:52 -07:00 · 95c7b07693
parent 1e7fb0b822
commit 95c7b07693
1 changed files with 1 additions and 1 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -39,6 +39,6 @@ matrix:
    - python: 3.6
      env: TOXENV=black-check
 install:
-    - if [[ $TRAVIS_PYTHON_VERSION == 3.3 ]]; then pip install virtualenv==15.2.0; fi
+    - if [[ $TRAVIS_PYTHON_VERSION == 3.3 ]]; then pip install virtualenv==15.2.0 tox==3.1.3; fi
    - pip install tox
 script: tox