diff --git a/.travis.yml b/.travis.yml
index f30a68d6c..6b67c31dc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,5 +10,7 @@ before_script:
 script:
   - "bundle exec rake knapsack:rspec"
 env:
-  - CI_NODE_TOTAL=2 CI_NODE_INDEX=0
-  - CI_NODE_TOTAL=2 CI_NODE_INDEX=1
\ No newline at end of file
+  - CI_NODE_TOTAL=4 CI_NODE_INDEX=0
+  - CI_NODE_TOTAL=4 CI_NODE_INDEX=1
+  - CI_NODE_TOTAL=4 CI_NODE_INDEX=2
+  - CI_NODE_TOTAL=4 CI_NODE_INDEX=3
\ No newline at end of file