try forcing a single process for readability

zachthompson · zachthompson · commit 3ccfdeb8498a · 2016-03-01T16:41:48.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -24,4 +24,4 @@ language: perl
 perl:
   - 5.16
 script:
-  - prove -lr t
+  - prove -lr -j1 t
