diff --git a/.travis.yml b/.travis.yml
index b01f2843b..6baf2b758 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,5 +8,5 @@ install:
   - npm install -g codecov
   - yarn
 after_success:
-  - yarn cover
+  - yarn cover --maxWorkers=$(nproc)
   - bash <(curl -s https://codecov.io/bash)