OSX boxes are only 1 core

jenshnielsen · jenshnielsen · commit 5bc35b1ae679 · 2016-06-16T16:54:23.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -62,7 +62,7 @@ matrix:
     - os: osx
       osx_image: xcode7.3
       language: generic
-      env: MOCK=mock
+      env: MOCK=mock NOSE_ARGS=
   allow_failures:
     - python: "nightly"
 
