env: JOBCACHE=9

.travis.yml

@@ -53,8 +53,8 @@ matrix:
     - name: Lint Python code with flake8
       language: python
       python: 3.6
-      cache:
-        - pip
+      cache: pip
+      env: JOBCACHE=9
       install: pip install flake8
       script: flake8 . --count --exclude=./.*,./Lib,./vm/Lib  --select=E9,F63,F7,F82 --show-source --statistics