Tests(tox): Require tox <= 2.9.1

tox 3+ dropped support of Python 3.3.

diff --git a/.travis.yml b/.travis.yml
index afe6f972a2d1a0687f9fecc27bb313491b0c2250..d023397af257a0676b283e3bee6c8d436bd37393 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,7 +32,7 @@ matrix:
     env: TOXENV=pypy
 
 install:
-  - travis_retry pip install --upgrade pip setuptools tox ppu
+  - travis_retry pip install --upgrade pip setuptools "tox <= 2.9.1" ppu
 
 script:
   - tox

diff --git a/devscripts/requirements/requirements_tox.txt b/devscripts/requirements/requirements_tox.txt
index ff4ecb65168e532d24caac30294992218b490643..2978a0b78a93c2eda0e2b06ac89f66532301680f 100644 (file)
--- a/devscripts/requirements/requirements_tox.txt
+++ b/devscripts/requirements/requirements_tox.txt
@@ -1 +1 @@
-tox >= 2.0
+tox >= 2.0, <= 2.9.1