Does this version work?

jsmnbom · jsmnbom · commit 9264264a02ae · 2017-06-22T19:31:52.000+02:00
See travis-ci/travis-ci#6727 for more info too
diff --git a/.travis.yml b/.travis.yml
@@ -5,7 +5,7 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
-  - "pypy-5.8.0"
+  - "pypy-5.7.1"
   - "pypy3.5-5.8.0"
 
 dist: trusty
