Temporarily force use of new font caches.

anntzer · anntzer · commit ccd00ac75e71 · 2018-11-25T15:42:43.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -80,15 +80,20 @@ matrix:
       dist: trusty
       # pytest-cov>=2.3.1 due to https://github.com/pytest-dev/pytest-cov/issues/124.
       env:
+        - DELETE_FONT_CACHE=1
         - PINNEDVERS='-c requirements/testing/travis35.txt'
     - python: 3.6
       env:
         - DELETE_FONT_CACHE=1
         - EXTRAREQS='-r requirements/testing/travis36.txt'
     - python: 3.7
       sudo: true
+      env:
+        - DELETE_FONT_CACHE=1
     - python: "nightly"
-      env: PRE=--pre
+      env:
+        - PRE=--pre
+        - DELETE_FONT_CACHE=1
     - os: osx
       language: generic  # https://github.com/travis-ci/travis-ci/issues/2312
       only: master
diff --git a/lib/matplotlib/tests/test_font_manager.py b/lib/matplotlib/tests/test_font_manager.py
@@ -1,6 +1,7 @@
 from io import BytesIO
 import os
 import shutil
+import sys
 import tempfile
 import warnings
 
