CI: Resolve timeout issue on Travis

gfyoung · gfyoung · commit ccc8bb383bce · 2018-09-09T17:18:47.000-07:00
diff --git a/ci/travis-27.yaml b/ci/travis-27.yaml
@@ -40,7 +40,7 @@ dependencies:
   - xlwt=0.7.5
   # universal
   - pytest
-  - pytest-xdist
+  - pytest-xdist=1.22.5
   - moto
   - pip:
     - backports.lzma
