Failure is not an option (#4527)

diff --git a/.travis.yml b/.travis.yml
index 6ed017d..faa3527 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -88,11 +88,6 @@
           # urllib3 tests fail on xenial for whatever reason
           dist: trusty
           sudo: false
-    allow_failures:
-        # Remove allow_failures as soon as josepy's flake8 issue is resolved
-        # https://github.com/certbot/josepy/pull/39
-        - python: 2.7
-          env: DOWNSTREAM=certbot-josepy
 
 install:
     - ./.travis/install.sh