Run one parallel xdist worker.

Lukasa · Lukasa · commit 3114114f7f39 · 2016-02-19T16:15:31.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -31,7 +31,7 @@ script:
         if [[ $TRAVIS_PYTHON_VERSION == pypy ]]; then
           py.test test/
         else
-          py.test --cov hyper test/
+          py.test -n 1 --cov hyper test/
           coverage report -m --fail-under 100
         fi
       fi
