diff --git a/.circleci/config.yml b/.circleci/config.yml
index 5c5e428ac..2b1f4faa4 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -50,7 +50,7 @@ jobs:
       - *restore_node_modules
       - run:
           name: yarn test:unit
-          command: yarn test:unit
+          command: yarn test:unit -w 1
 workflows:
   version: 2
   install-tests: